Amazon vs eBay vs Your Own Store: The $3,860/Year Supplier Profit Gap Most Importers Ignore
You found a supplier. You negotiated pricing that beats 80% of competitors. Your product quality is solid, and your shipping costs are under control. Now comes the question that quietly decides whether you bank $15,000 this year or $40,000: which marketplace do you sell on? Here’s the uncomfortable math most importers miss: the same product from the same supplier generates wildly different profits depending on where you list it. A product that costs you $7.50 from the factory and sells for $24.99 can yield $6.39 on Amazon, $7.04 on eBay, $9.11 on your own Shopify store, or $7.69 on Etsy. That’s a $2.72 variance per sale — and at 500 sales per month, that’s a $3,860 swing in annual profit from the exact same inventory. This isn’t a theoretical exercise. It’s the difference between a side hustle and a real business. In this guide, you’ll learn exactly how each marketplace treats your supplier relationship — and which one puts the most money in your pocket.

The Amazon Math: Traffic Volume vs Fee Compression

Amazon doesn’t sell products. It sells access to 310 million active customer accounts. For a small importer with a well-sourced product, that access is the fastest path to revenue. You can upload your listing on Monday and see your first sale by Wednesday. No audience building. No ad budget required for organic discovery. The traffic is just there. As our eBay vs Amazon vs Etsy: Which Online Marketplace Selling Strategy Wins for Small Importers details, this traffic advantage is Amazon’s single biggest value proposition for new importers — and it can make or break your first 90 days in business. But that traffic comes with a steep toll. Amazon’s referral fees range from 8% to 15%, and Fulfillment by Amazon (FBA) fees consume another 15% to 30% of your selling price depending on size and weight. For a $24.99 product with a $7.50 supplier cost, Amazon’s combined fees run approximately $7.10 per unit. Your gross profit: $6.39. That’s a 25.6% margin on paper — and a 56% fee-to-cost ratio that means Amazon keeps more than it lets you keep. The real trap isn’t the fee structure itself — it’s the competitive pressure. As of 2025, over 2 million sellers compete for Buy Box placement on Amazon. If you’re not running PPC ads ($0.50 to $2.00 per click in most categories), your product gets buried on pages your customers will never scroll to. Amazon’s own data shows that 70% of shoppers never click past the first page of search results. Without ad spend, organic rankings are a slow grind that favors established sellers with thousands of reviews. That said, Amazon works brilliantly for certain products: small, lightweight items with low return rates that justify FBA’s logistics premium. If your supplier relationship gives you a genuine cost advantage — say, 40% below retail — Amazon’s scale can still produce strong total dollar profit even with compressed margins. The key is knowing your numbers before you list, not after.

eBay’s Middle Ground: Lower Fees, More Supplier Control

eBay doesn’t get the same love as Amazon in 2025, and that’s exactly why it works for smart importers. With approximately 132 million active buyers, eBay’s audience is smaller — but so is the competition, and so are the fees. eBay charges roughly 13.25% on the total sale amount (including shipping) plus a flat $0.30 per order. No forced fulfillment. No storage fees. No long-term inventory penalties. The biggest financial advantage eBay offers small importers is supplier-directed fulfillment flexibility. If you’ve built a strong relationship with your supplier, you can negotiate direct-to-customer shipping under your brand. Your supplier ships from their warehouse, you pay the negotiated shipping cost, and your customer gets the product without Amazon’s middleman markup. On a $24.99 product, that saves you roughly $4.50 per unit in FBA fees — money that goes straight to your bottom line. eBay also offers something Amazon doesn’t: pricing flexibility that rewards supplier relationships. eBay buyers are more accustomed to seeing shipping costs broken out separately, which lets you build margin into your shipping line. If your supplier offers consolidated shipping at volume (and most do at 200+ units per order), you can charge $4.99 shipping on a package that costs you $3.50 to send — pocketing the $1.49 as additional profit. On 500 units a month, that’s $8,940/year in shipping margin alone. The trade-off? eBay requires more hands-on management. Listing quality, feedback scores, and detailed product descriptions directly impact your search ranking. eBay’s algorithm rewards sellers who treat the platform like a real business, not a passive income stream. But for importers willing to invest the time, eBay’s lower fee structure and supplier-friendly logistics create a 27% higher per-unit profit than Amazon in most categories.

Your Own Shopify Store: Maximum Margin When You Own the Traffic

A Shopify store is the purest expression of your supplier money engine. No referral fees. No marketplace algorithms. No category managers telling you what to price. You set the price, you keep the margin, and you own the customer relationship forever. On that same $24.99 product with a $7.50 supplier cost, your gross profit jumps to $16.66 per unit — more than double what Amazon leaves you. The catch is the one nobody wants to talk about: you have to bring your own traffic. Shopify has zero built-in audience. A new store without a marketing strategy is a digital ghost town. According to data from BuiltWith’s ecommerce analysis, the median Shopify store generates approximately $2,000 to $4,000 per month in revenue, while the top 1% exceed $100,000. The gap isn’t product quality — it’s traffic acquisition cost. The smartest play for small importers isn’t choosing Shopify instead of marketplaces — it’s using Shopify on top of marketplace sales. Here’s the strategy that works: list your product on Amazon and eBay for volume and discovery. Include a branded insert in every package offering a discount code for future purchases on your Shopify store. Once a customer buys from your store, their next purchase costs you zero marketplace fees. The margin improvement on that second sale is 30–40% compared to the same sale on Amazon. This is the same principle behind the How to Turn White Label Products Into a Profitable Brand in 30 Days — the supplier relationship stays the same, but your margin compounds with every repeat purchase. If you’re sourcing from a supplier who offers custom packaging or private labeling, this strategy compounds. Your branded packaging, your insert, your store — the customer experience stays consistent, and the profit stays yours. The supplier relationship that gives you a 15% cost advantage on the factory floor becomes a 50% margin advantage when you remove marketplace fees from the equation.

Etsy’s Quiet Margin Advantage for Visual Products

Etsy is often dismissed by importers who think it’s only for hand-knitted scarves and vintage vinyl. That’s a mistake that costs money. Etsy’s fee structure is strikingly favorable: a $0.20 listing fee, a 6.5% transaction fee, and a 3% plus $0.25 payment processing fee. Total marketplace take: roughly 10% of the sale price — nearly half of Amazon’s effective rate. For importers sourcing visually distinctive products — jewelry components, decorative home goods, boutique kitchen tools, stationery, party supplies — Etsy can deliver the highest per-sale margins of any marketplace. On a $24.99 product, Etsy’s total fees run approximately $2.40, leaving a gross profit of $7.69 per unit with FBM (fulfilled by merchant). That’s 20% more than Amazon FBA and requires no storage fees or long-term commitments. The catch is volume ceiling. Etsy’s active buyer base sits around 90 million — roughly one-third of Amazon’s reach. And Etsy’s search algorithm heavily favors shops with strong engagement metrics: complete profiles, positive reviews, responsive messaging, and frequent new listings. It’s not a set-and-forget platform. Sellers who treat Etsy as a part-time effort typically top out at 100–200 sales per month, while dedicated Etsy sellers can push 500+ in established categories. But here’s where Etsy shines for the supplier money engine: repeat buyer rates are higher. Etsy reports that 44% of first-time buyers return within 12 months — significantly higher than eBay and comparable to Amazon. Each repeat sale carries zero additional customer acquisition cost. If your supplier can provide product variations (different colors, sizes, or bundle options), Etsy’s algorithmic recommendation engine naturally cross-sells them. The result is a marketplace that rewards product depth over aggressive pricing — a perfect fit for importers who have built strong, flexible supplier relationships.

The Multi-Marketplace Strategy That Maximizes Your Supplier Value

The most profitable importers don’t pick one marketplace. They run several in parallel, allocating products based on margin characteristics. Here’s the framework top sellers use: Tier 1 — High Volume, Low Margin (Amazon): Products under 1 pound, under $15 supplier cost, with low return rates. These products benefit from Amazon’s traffic and FBA’s logistics efficiency. Accept 25–30% gross margins because the volume makes up for it. A product generating 1,000 sales per month at $6.39 profit produces $6,390/month in total profit — even with compressed per-unit margins. Tier 2 — High Margin, Medium Volume (eBay): Products where supplier relationships and shipping flexibility matter. Any product where you can negotiate direct-to-customer fulfillment from your supplier. Target 35–40% gross margins. On 300 sales per month at $7.04 profit, that’s $2,112/month with lower fee exposure. Tier 3 — Maximum Margin, Repeat Buyers (Shopify): Products where you’ve established a brand or private label. Products with strong repeat purchase potential (consumables, accessories, refills). Target 55–65% gross margins. Even 150 sales per month at $9.11 profit generates $1,366/month — with zero marketplace dependency risk. The combined total from all three tiers: $9,868/month from the same supplier relationship, spread across three marketplaces. That’s $118,416/year — far more than any single platform can deliver. To calculate this for your own products, use the The Importer’s Cost Calculation Workbook: 7 Hidden Traps That Inflate Your Landed Cost by 30% to account for every fee, shipping cost, and marketplace deduction before choosing your platforms.

How to Choose Your First Marketplace Based on Supplier Type

If you’re just starting out, your supplier relationship should dictate your marketplace choice, not the other way around: If your supplier offers dropshipping with fast shipping — start on eBay. The lower fees and fulfillment flexibility let you test products without inventory risk. Your margin floor is higher, and your downside is limited to listing time. If your supplier offers custom packaging or branding — start on Etsy. The platform rewards distinctive, branded products, and the fee structure gives you room to invest in packaging that builds a real brand. If your supplier is a factory with strict MOQs — start on Amazon. You need volume to clear inventory commitments, and Amazon’s traffic delivers that. Just calculate your all-in costs carefully before placing that first bulk order. If your supplier offers private label with fulfillment services — start with both eBay and Shopify simultaneously. Use eBay for cash flow and validation, and build your Shopify store in parallel for the repeat buyer loop. The common thread: your supplier relationship determines your cost structure, and your cost structure determines which marketplace makes you the most money. Stop asking “which marketplace is best” and start asking “which marketplace best monetizes my specific supplier advantage.

Frequently Asked Questions

Which marketplace has the lowest fees for small importers?

Shopify (your own store) has the lowest effective fees — roughly 2.9% plus $0.30 per transaction for payment processing. Etsy is second at roughly 10% total. eBay runs about 13.5% including payment processing. Amazon is the highest at 15% to 30% depending on fulfillment method.

Can I sell the same product on multiple marketplaces?

Yes, and you absolutely should. Most successful importers list on 2–3 marketplaces simultaneously. The key is allocating inventory and fulfillment strategy per platform. Use FBA for Amazon, merchant fulfillment for eBay, and your own store for Shopify. Your supplier doesn’t care where you sell — they just want consistent volume.

How much money can I save by using supplier-directed fulfillment instead of FBA?

Between $3.50 and $6.00 per unit depending on product size and weight. For a small, lightweight product (under 1 pound), the savings are approximately $4.50 per unit. At 500 sales per month, that’s $27,000/year in recovered margin. You just need a supplier who can handle direct-to-customer shipping reliably.

Do I need separate supplier relationships for different marketplaces?

No. One good supplier relationship serves every marketplace. The supplier provides the product at the negotiated price. You decide where to list it. The same $7.50 unit cost works on Amazon, eBay, Shopify, and Etsy — the profit difference comes entirely from fee structure and fulfillment method, not from the supplier.

Which marketplace is best for testing a new product from a new supplier?

eBay is the best testing ground. Lower upfront investment, lower fees, and flexible fulfillment let you validate demand with minimal risk. If a product sells 50 units on eBay in the first month, you have real demand data before committing to Amazon FBA inventory or a Shopify ad budget. eBay is your validation layer; Amazon and Shopify are your scaling layers.