Stainless Steel Material Guide for Beauty Device Buyers - Alibaba.com Seller Blog
EN
Start selling now

Stainless Steel Material Guide for Beauty Device Buyers

304 vs 316L Properties, ISO 22716 Compliance & Smart Sourcing on Alibaba.com

Key Insights for Southeast Asian Exporters

  • 316L stainless steel contains 2-3% molybdenum, providing superior corrosion resistance compared to 304 grade, but costs 10-30% more [1][3]
  • ISO 22716 GMP guidelines require cosmetic manufacturing equipment to be made of materials that do not react with formulas, with 316L being the recommended standard [4]
  • Amazon buyer reviews (4.7 stars, 413 reviews) highlight durability, cooling effect, and easy cleaning as top purchase drivers for stainless steel beauty tools [5]
  • Small batch orders (300-500 units) face MOQ challenges on Alibaba.com, but Trade Assurance and QC video verification can mitigate risks [6]

Executive Summary: Why Stainless Steel Material Selection Matters for Beauty Device Exporters

For Southeast Asian manufacturers and exporters selling beauty devices on Alibaba.com, material selection is not just a technical specification—it's a strategic business decision that impacts product safety, regulatory compliance, buyer trust, and ultimately, your competitiveness in the global B2B marketplace. The breast massager and home beauty equipment category represents a specialized segment with an active buyer base on Alibaba.com, demanding rigorous attention to material quality due to direct skin contact and hygiene requirements.

This guide focuses on stainless steel material as a key attribute configuration for beauty device manufacturing. We provide an objective, educational analysis of different stainless steel grades (primarily 304 and 316L), their properties, applicable scenarios, cost implications, and compliance requirements. Importantly, this article does not advocate that stainless steel is the only or best choice for all scenarios—rather, it equips you with the knowledge to make informed decisions based on your target market, product positioning, and budget constraints.

Market Context: The home beauty equipment category on Alibaba.com maintains a stable, engaged buyer community actively seeking quality-certified products. Macro trade data reveals strong growth momentum in Q1 2026, signaling market recovery and expanding opportunities for differentiated products with superior material quality and compliance documentation.

Understanding Stainless Steel Grades: 304 vs 316L Technical Comparison

Stainless steel is not a single material but a family of alloys with varying compositions. For beauty device manufacturing, two grades dominate the market: 304 stainless steel and 316L stainless steel. Understanding their differences is fundamental to making appropriate procurement decisions.

304 vs 316L Stainless Steel: Technical Properties Comparison

Property304 Stainless Steel316L Stainless SteelPractical Implication
Chromium Content18-20%16-18%Both provide basic corrosion resistance through chromium oxide layer
Nickel Content8-10.5%10-14%316L has higher nickel for enhanced durability
Molybdenum Content0%2-3%316L's molybdenum provides superior corrosion resistance, especially against chlorides
Carbon Content≤0.08%≤0.03% (L=Low carbon)316L's lower carbon reduces welding corrosion risk
Corrosion ResistanceGood for general useExcellent, especially in saline/chloride environments316L preferred for products contacting skin/sweat
BiocompatibilitySuitable for non-implant devicesImplant-grade, ISO 10993 certified316L required for invasive or long-term contact products
Surface Finish Options2B, BA, No. 42B, BA, No. 4, ElectropolishBoth support smooth, non-porous finishes for easy cleaning
Typical ApplicationsHousings, carts, non-critical partsPatient-contact surfaces, surgical instruments, implantable devicesMatch grade to product risk level
Source: Fortran Steel Medical Device Standards, Vishwa Stainless Price Analysis [1][3]

The 2-3% molybdenum content in 316L is the key differentiator. Molybdenum significantly enhances resistance to pitting and crevice corrosion, particularly in chloride-rich environments (such as human sweat, saline solutions, or cleaning agents). For beauty devices that contact skin directly—like facial rollers, massagers, or extraction tools—316L provides a safety margin that 304 cannot match [1].

However, 304 stainless steel remains perfectly adequate for many applications. If your product is a housing component, external frame, or non-contact part, 304 offers excellent performance at a lower cost. The key is matching the material grade to the actual risk profile of your product, not over-specifying (which inflates costs) or under-specifying (which risks quality failures).

ISO 22716 GMP Compliance: What Beauty Device Manufacturers Must Know

For exporters targeting the European Union, United States, or other regulated markets, ISO 22716 Good Manufacturing Practice (GMP) compliance is increasingly mandatory. This international standard, adopted by the EU Cosmetics Regulation 1223/2009 and referenced by the FDA's MoCRA legislation (2022), establishes comprehensive guidelines for cosmetic production, control, storage, and shipment [4].

While ISO 22716 primarily addresses cosmetic formulations, its equipment requirements directly impact beauty device manufacturers whose products are used in cosmetic application or production. The standard explicitly states that equipment must not be made of any material that could interact with ingredients, products, or cleaning agents [4]. This is where stainless steel—particularly 316L—becomes the default choice for compliance-conscious buyers.

Equipment shouldn't be made of any material that could interact with the ingredients, products, or cleaning agents. If broken or no longer suitable for use, GMP guidelines require companies to fix, replace, or dispose of equipment adequately and safely. [4]

Key ISO 22716 equipment requirements relevant to stainless steel selection include:

Non-reactive Materials: Equipment must not chemically interact with cosmetic formulations. 316L stainless steel's superior corrosion resistance makes it the preferred choice for mixing vessels, application tools, and storage containers that contact product directly [4].

Non-porous Surfaces: Equipment surfaces must be smooth, easy to clean, and resistant to microbial growth. Both 304 and 316L can achieve the required surface finishes (2B, BA, electropolish), but 316L maintains its surface integrity longer under repeated cleaning cycles [4].

Traceability: ISO 22716 requires batch/lot traceability for all materials. When sourcing stainless steel components on Alibaba.com, request EN 10204 3.1 certificates (material test reports) that verify the chemical composition and mechanical properties of the steel you receive [1][4].

Cleaning Validation: Equipment must be designed for easy cleaning and sanitization. Stainless steel's non-porous surface supports this requirement, but the grade matters—316L resists corrosion from aggressive cleaning agents (chlorine-based sanitizers, acidic cleaners) better than 304 [4].

Compliance Reality Check: As of 2024, ISO 22716 GMP compliance is mandatory in the EU, highly encouraged by the FDA in the US, and required under Canada's Food and Drugs Act. For Southeast Asian exporters, achieving ISO 22716 certification can be a significant competitive differentiator when selling on Alibaba.com to buyers in regulated markets [4].

Cost-Performance Analysis: Is 316L Worth the Premium?

The most common question from procurement managers is: Should we pay extra for 316L, or is 304 sufficient? The answer depends on your product's use case, target market, and risk tolerance. Let's examine the numbers objectively.

304 vs 316L Stainless Steel: Cost Comparison (2025-2026 Market Prices)

GradePrice Range (USD/kg)Relative CostKey Cost Driver
304 Stainless Steel$3.50 - $5.00Baseline (100%)Nickel market volatility
316 Stainless Steel$4.50 - $6.50+10-30% vs 304Molybdenum content (2-3%)
316L Stainless Steel$4.75 - $7.00+15-35% vs 304Low carbon + molybdenum premium
Source: Vishwa Stainless Price Analysis, December 2025 update [3]

The 10-30% cost premium for 316L (some sources cite up to 50% depending on market conditions) is primarily driven by molybdenum content. Molybdenum is a relatively rare alloying element, and its price fluctuates with global supply-demand dynamics. Nickel prices also significantly impact both grades, as both 304 and 316L are austenitic stainless steels with substantial nickel content [3].

ROI Considerations: While 316L costs more upfront, the total cost of ownership may favor 316L in certain scenarios:

  • Longer Product Lifespan: 316L's superior corrosion resistance means less degradation over time, reducing warranty claims and replacement costs.
  • Lower Cleaning Costs: 316L tolerates harsher cleaning agents without corroding, potentially reducing cleaning frequency or chemical costs.
  • Premium Pricing Power: Products marketed as '316L surgical-grade steel' can command higher B2B and B2C prices, offsetting the material cost difference.
  • Regulatory Risk Mitigation: For products sold in EU/US markets, 316L reduces the risk of non-compliance findings during audits or inspections.

When 304 Makes Sense: Don't automatically default to 316L. 304 is the right choice when:

  • The product does not contact skin directly (e.g., external housing, stand, cart)
  • The target market has no specific regulatory requirements mandating 316L
  • Cost competitiveness is the primary purchasing criterion
  • The product is designed for short-term or disposable use

What Buyers Are Really Saying: Market Feedback from Amazon & Reddit

To understand real-world buyer expectations, we analyzed 413 Amazon reviews (4.7-star average rating) for stainless steel facial rollers and massagers, plus active discussions on Reddit's manufacturing and procurement communities. The insights reveal what end-users and B2B buyers actually value—and what they complain about [5][6].

Amazon Verified Buyer• Amazon.com
It's beautifully made, NOTHING cheap about it! The roller part is super smooth, and when you're holding it, it has some weight to it. It's way nicer than the jade roller. [5]
5-star review, Shannon F, Verified Purchase, 4.7 stars 413 reviews
Amazon Verified Buyer• Amazon.com
Many face rollers we've tried say they are stainless steel, but the rollers end up being plastic. Not the case with this set. Everything is stainless steel. Very well made with some nice weight in your hand. Quality product that should last a long time. [5]
5-star review, UCSDsoccer, 4.7 stars 413 reviews
Amazon Verified Buyer• Amazon.com
Love these tools! The only thing that I think I like more about a stone is that it's always cold where this set will sometimes become warm. [5]
5-star review, Jenai, 4.7 stars 413 reviews

Key Takeaways from Amazon Reviews:

  • Durability is Paramount: Buyers repeatedly mention 'well-made,' 'sturdy,' 'quality product,' and 'should last a long time.' Stainless steel's perceived durability is a major purchase driver compared to jade, plastic, or other materials.
  • Weight Matters: Multiple reviews mention 'nice weight' or 'substantial weight' as a positive attribute. This signals quality to end-users, though some find it too heavy—a design consideration for ergonomics.
  • Cooling Effect: The 'cooling' or 'cold' sensation is a frequently praised feature. Stainless steel's thermal conductivity provides this effect, though it warms up with use (a minor complaint).
  • Easy Cleaning: Reviews highlight that stainless steel 'cleans easily' compared to porous materials like jade or rose quartz.
  • Price Sensitivity: At $9.99, this product is positioned as high-value compared to $14-35 alternatives. Buyers appreciate quality at an accessible price point [5].

Reddit Manufacturing Community Member• r/manufacturing
Go straight to Dongguan factories and keep plating in-house. We work with 316L, run 200-pc tests for new SKUs, and shoot QC vids before anything leaves the building. [6]
316L jewelry sourcing discussion, 1 upvote
Reddit Manufacturing Community Member• r/manufacturing
Getting china factories to care about 300-500 units for full custom cad is a nightmare. They'll either ghost you or push the lead time to 3 months. [6]
Small MOQ challenges discussion, 2 upvotes
Reddit Buy It For Life Community Member• r/BuyItForLife
The main thing to check is clip quality and steel thickness. Thin steel bends easily and weak clips break fast. Look for close-up latch photos and real customer reviews mentioning long-term use. [6]
Stainless steel lunchbox quality discussion, 1 upvote

Key Takeaways from Reddit Discussions:

  • Small MOQ Challenges: Orders of 300-500 units face significant challenges—factories may ignore inquiries or quote 3-month lead times. This is critical information for small businesses sourcing on Alibaba.com.
  • QC Verification is Essential: Experienced buyers insist on QC videos/photos before shipment. Don't rely solely on factory claims—verify material grade and workmanship visually.
  • Steel Thickness Matters: Thin steel bends and breaks. Specify minimum thickness requirements in your purchase orders.
  • Dongguan Factories Recommended: For stainless steel products, Dongguan (Guangdong Province) is frequently mentioned as a manufacturing hub with experienced suppliers.
  • Alibaba Trade Assurance: Reddit users specifically mention using Alibaba.com's Trade Assurance for payment protection when sourcing from Chinese factories [6].

Configuration Comparison: Choosing the Right Material Strategy for Your Business

There is no single 'best' material configuration—only the best fit for your specific business context. The following table provides an objective comparison to help you evaluate options based on your target market, product positioning, and operational constraints.

Stainless Steel Configuration Options: Pros, Cons & Best Use Cases

ConfigurationCost LevelBuyer PreferenceBest ForRisks/Limitations
316L Stainless Steel (Full Product)High (+15-35% vs 304)Premium buyers, EU/US regulated markets, medical-grade positioningProducts with direct skin contact, long-term use items, brands targeting quality-conscious buyersHigher upfront cost, may be over-specified for low-risk applications, longer lead times for certified material
304 Stainless Steel (Full Product)Medium (Baseline)Cost-conscious buyers, emerging markets, general consumer productsNon-critical components, housing/frames, products for price-sensitive markets, short-to-medium term useLower corrosion resistance may lead to quality issues in humid/saline environments, not suitable for implant-grade claims
316L Contact Surfaces + 304 HousingMedium-HighBalanced approach, value-conscious premium buyersProducts where only specific parts contact skin (e.g., roller head is 316L, handle is 304)Requires clear communication to buyers about material differentiation, potential confusion if not labeled properly
Alternative Materials (Aluminum, Plastic, Jade)Low to MediumBudget buyers, specific aesthetic preferences, disposable productsLow-cost product lines, fashion-focused items, single-use or short-lifespan productsPerceived as lower quality, may not meet regulatory requirements for certain markets, shorter product lifespan
Coated/Plated Base MetalLowUltra-budget segment, promotional productsTemporary/seasonal products, gift items, low-price-point impulse purchasesCoating wears off revealing base metal, high return/complaint risk, not suitable for B2B professional buyers
Note: Cost levels are relative comparisons. Actual prices vary by order quantity, supplier, and market conditions. Data sources: Fortran Steel, Vishwa Stainless, Amazon Reviews, Reddit Discussions [1][3][5][6].

Critical Insight: The 'best' configuration depends on your buyer persona, not just technical specifications. A buyer sourcing for a spa chain in Germany has different requirements than a buyer sourcing promotional items for a cosmetics brand's gift-with-purchase campaign.

Sourcing Stainless Steel Components on Alibaba.com: Practical Guide for Southeast Asian Exporters

For Southeast Asian manufacturers and traders looking to source stainless steel components or finished products on Alibaba.com, the platform offers access to thousands of verified suppliers—primarily from China's manufacturing hubs like Dongguan, Foshan, and Ningbo. However, navigating this marketplace requires due diligence to ensure you receive the material grade and quality you paid for.

Step 1: Define Your Specifications Clearly

Before contacting suppliers, document your requirements in detail:

  • Material Grade: Specify 304, 316, or 316L explicitly (don't just say 'stainless steel')
  • Certification Requirements: EN 10204 3.1 material test report, ISO 22716 compliance documentation, FDA 21 CFR Part 820 (if applicable)
  • Surface Finish: 2B, BA, No. 4, electropolish—include roughness requirements (Ra value) if critical
  • Dimensions & Tolerances: Provide detailed drawings with acceptable tolerance ranges
  • Testing Requirements: Salt spray testing hours, hardness testing, chemical composition verification [1][4].

Step 2: Supplier Qualification on Alibaba.com

Use Alibaba.com's filtering and verification tools:

  • Verified Supplier Badge: Indicates the supplier has passed third-party verification
  • Trade Assurance: Provides payment protection and quality guarantees
  • Years on Platform: Suppliers with 5+ years typically have more established quality systems
  • Response Rate & Time: Fast, professional responses signal reliable communication
  • Product Photos & Videos: Request close-up photos of material grain, welding quality, surface finish

Step 3: Request Documentation Before Ordering

Legitimate suppliers should provide:

  • Material Test Reports (MTR): EN 10204 3.1 certificates showing actual chemical composition
  • Quality Control Procedures: Description of their QC process, testing equipment used
  • Previous Customer References: Especially for buyers in your target market (EU, US, Southeast Asia)
  • Sample Availability: Willingness to send samples before bulk production (you may need to pay for samples and shipping) [1].

Step 4: Negotiate MOQ and Lead Time Realistically

As Reddit discussions highlight, small orders (300-500 units) face challenges [6]. Strategies to improve your position:

  • Consolidate Orders: Combine multiple SKUs to reach higher total quantities
  • Accept Standard Components: Use supplier's existing molds/designs rather than full custom tooling
  • Plan Ahead: Expect 2-3 month lead times for custom orders; don't rush suppliers
  • Build Relationships: Start with smaller trial orders, then scale up as trust develops
  • Consider Stock Items: Some suppliers maintain inventory of common stainless steel components for faster delivery

Step 5: Implement QC Verification

Before final payment:

  • Pre-shipment Inspection: Hire a third-party inspection service (SGS, Intertek, or local QC companies) to verify material grade, dimensions, and workmanship
  • QC Videos: As Reddit buyers recommend, request video documentation of production and final inspection [6]
  • Sample Testing: Send random samples to independent labs for chemical composition verification (XRF analysis can confirm 304 vs 316L)
  • Documentation Review: Verify all certificates match the actual shipment (batch numbers, quantities, specifications)

Alibaba.com Advantage: The platform's Trade Assurance program protects your payment until you confirm satisfactory delivery. For stainless steel sourcing, this provides leverage to enforce quality requirements and resolve disputes if materials don't match specifications.

Decision Framework: Which Material Configuration Should You Choose?

Based on the analysis above, here's a practical decision framework to guide your material selection. Remember: there is no universally optimal choice—only the best fit for your specific situation.

Material Selection Decision Matrix by Buyer Type and Market

Your SituationRecommended ConfigurationRationaleKey Considerations
Exporting to EU/US regulated markets316L for all product-contact surfacesISO 22716 GMP compliance, FDA MoCRA alignment, reduced regulatory riskBudget for certification documentation, longer lead times for certified material, premium pricing to buyers
Targeting price-sensitive emerging markets (Southeast Asia, Africa, Latin America)304 stainless steelAdequate performance at lower cost, competitive pricing for budget-conscious buyersEnsure proper surface finish for hygiene, communicate quality value despite lower grade
Small batch orders (<500 units), startup brand304 with optional 316L upgrade for premium SKULower MOQ barriers, reduced inventory risk, test market response before committing to 316LBe transparent about material grade, consider hybrid approach (316L contact parts, 304 housing)
Established brand, quality positioning, repeat B2B buyers316L full product or 316L contact + 304 housingBrand reputation protection, reduced warranty claims, premium pricing powerInvest in marketing material grade as differentiator, obtain and display certifications
Promotional/disposable products, gift-with-purchase304 or alternative materials (aluminum, coated steel)Cost minimization for short-lifespan products, acceptable quality for temporary useAvoid over-engineering, focus on aesthetic appeal and immediate perceived value
Medical-grade or professional spa equipment316L with full certification packageLiability protection, professional buyer expectations, regulatory compliance mandatoryBudget for comprehensive documentation, third-party testing, potential product liability insurance
This matrix is a starting point. Always validate decisions with your specific buyer requirements and market research. Data sources: Fortran Steel, Vishwa Stainless, Registrar Corp ISO 22716 Guide, Amazon Reviews, Reddit Discussions [1][3][4][5][6].

Why Alibaba.com for Stainless Steel Beauty Device Sourcing?

For Southeast Asian exporters and manufacturers, Alibaba.com offers distinct advantages over traditional sourcing channels when procuring stainless steel components or finished beauty devices:

Global Buyer Access: Alibaba.com connects you with buyers from 190+ countries, including high-value markets (US, EU, UK, Australia) where stainless steel quality and compliance matter most. The home beauty equipment category on the platform represents an active, engaged community of verified B2B purchasers seeking quality-certified products.

Transparent Supplier Verification: Unlike offline trade shows or unverified directories, Alibaba.com provides:

  • Supplier verification badges (Verified Supplier, Gold Supplier)
  • Transaction history and buyer reviews
  • Trade Assurance payment protection
  • Dispute resolution mechanisms This transparency reduces the risk of receiving substandard materials or being defrauded.

Competitive Pricing Through Direct Factory Access: By connecting directly with manufacturers in Dongguan, Foshan, and other industrial hubs, you bypass intermediaries and access factory-direct pricing. The 10-30% cost difference between 304 and 316L is consistent across the platform, allowing you to make informed cost-benefit decisions [3].

Compliance Documentation Support: Many Alibaba.com suppliers serving EU/US markets already maintain ISO 22716, FDA, and CE documentation. When you filter for suppliers with these certifications, you reduce your compliance burden and accelerate time-to-market for regulated products [4].

Scalability: Whether you need 100 units for a trial order or 10,000 units for a major retail contract, Alibaba.com suppliers can scale with your business. Start small to validate quality, then increase order quantities as confidence grows.

Seller success stories on Alibaba.com demonstrate that manufacturers who invest in quality materials, transparent communication, and compliance documentation achieve higher repeat order rates and premium pricing from international buyers [4].

Action Plan: Next Steps for Southeast Asian Exporters

Based on this analysis, here's a practical action plan to implement your stainless steel sourcing strategy:

Immediate Actions (This Week):

  1. Audit Current Products: Review your existing product line—identify which items use stainless steel and what grade is currently specified.
  2. Map Buyer Requirements: Contact your top 5-10 buyers and ask specifically about their material grade expectations and certification requirements.
  3. Search Alibaba.com: Use keywords like '316L stainless steel beauty device,' 'ISO 22716 cosmetic equipment,' 'FDA approved stainless steel' to identify potential suppliers.
  4. Request Samples: Order samples from 3-5 shortlisted suppliers for hands-on quality evaluation.

Short-Term Actions (This Month):

  1. Obtain Certifications: If targeting EU/US markets, work with suppliers to obtain EN 10204 3.1 MTRs and ISO 22716 documentation.
  2. Update Product Listings: On your Alibaba.com storefront, clearly specify material grades (304 vs 316L) in product attributes—don't just say 'stainless steel.'
  3. Implement QC Process: Establish pre-shipment inspection procedures, either through third-party services or supplier-provided QC videos.
  4. Price Strategy Adjustment: If upgrading to 316L, calculate the cost increase and determine appropriate pricing adjustments for your target markets [1][4].

Long-Term Actions (This Quarter):

  1. Supplier Relationship Building: Develop strategic partnerships with 2-3 reliable suppliers rather than constantly switching based on price.
  2. Compliance Investment: Consider obtaining ISO 22716 certification for your own operations if you're manufacturing beauty devices.
  3. Market Diversification: Use material quality as a differentiator to enter higher-value markets (EU, US, Japan) rather than competing solely on price in saturated markets.
  4. Continuous Monitoring: Track buyer feedback, warranty claims, and return rates to identify any material quality issues early [4].

Key Success Metric: Aim for a repeat order rate of 40%+ from buyers who initially purchased stainless steel products. High repeat rates indicate your material quality meets or exceeds buyer expectations.

Conclusion: Making Informed Material Decisions for Global Competitiveness

Stainless steel material selection for beauty devices is not a binary choice between 'good' and 'bad'—it's a strategic decision that balances technical requirements, regulatory compliance, cost constraints, and market positioning. This guide has provided objective information to help you navigate these tradeoffs.

Key Takeaways:

  • 316L stainless steel offers superior corrosion resistance and biocompatibility, making it the preferred choice for products with direct skin contact and regulated markets—but comes at a 10-30% cost premium [1][3].
  • 304 stainless steel remains a viable, cost-effective option for non-critical components, price-sensitive markets, and products without direct skin contact.
  • ISO 22716 GMP compliance is increasingly mandatory for cosmetic-related equipment, with specific requirements for non-reactive, non-porous materials [4].
  • Real buyer feedback from Amazon (4.7 stars, 413 reviews) and Reddit manufacturing communities highlights durability, weight, cooling effect, and easy cleaning as key purchase drivers [5][6].
  • Alibaba.com provides transparent supplier verification, Trade Assurance protection, and access to certified manufacturers—making it a strategic platform for Southeast Asian exporters to source quality stainless steel components.

Ultimately, the 'best' material configuration is the one that aligns with your buyer's expectations, your target market's regulatory requirements, and your business's financial realities. Use the decision frameworks and comparison tables in this guide to evaluate your options objectively—not based on assumptions or supplier marketing claims.

For Southeast Asian manufacturers and exporters, investing in the right stainless steel material configuration—and communicating that quality transparently on Alibaba.com—can be a significant competitive differentiator in the global beauty device market. The home beauty equipment category's engaged buyer community represents real B2B opportunities for suppliers who prioritize quality, compliance, and transparent communication.

Ready to source stainless steel beauty devices on Alibaba.com? Start by searching for verified suppliers with 316L certifications, request material test reports, and use Trade Assurance to protect your investment. Your buyers—and your brand reputation—will thank you.

Start your borderless business here

Tell us about your business and stay connected.

Get Started
Start your borderless business in 3 easy steps
1
Select a seller plan
2
Pay online
3
Verify your business
Start selling now