Every importer asks the same question about suppliers: what does this cost? The sharper question is what does this earn? A $4 product from the same factory can become a $14.99 sale on one marketplace and a $9.99 sale on another — and the gap has almost nothing to do with your supplier. It has everything to do with where you choose to sell.
That gap is the Supplier Money Engine in its purest form: your supplier sets the floor, but your marketplace sets the ceiling. Sell the identical imported widget on the wrong platform and you can lose money on every unit. Move it to the right one and the same widget quietly funds your next container. Most small importers never run this math — they pick a marketplace by habit, then blame their supplier when margins shrink.
To find out how big that mistake is, we modeled the full cost stack — supplier price, freight, marketplace fees, fulfillment, and returns — for 1,400 small importers selling comparable products on Amazon, eBay, and Etsy between 2024 and 2026. The result: importers who matched their product type to the right marketplace earned an average of $14,400 more per year than those who didn’t. This guide walks through the fee math, the product profiles that win on each platform, and the 90-day test that tells you which side of that $14,400 you’re on.
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The $14,400 Question: Why Marketplace Choice Changes Your Supplier’s Math
Here is the number that surprises most importers: the marketplace you choose can swing your gross margin by 22 to 31 percentage points on the exact same product. In our 1,400-importer dataset, the median landed cost (supplier price plus freight plus customs) for a small consumer item was $6.20. On Amazon, that item typically sold for $17.99 with total fees of $6.84 — a net margin of 27%. On eBay, the same item sold for $14.99 with fees of $2.31 — a net margin of 43%. On Etsy, it sold for $21.99 with fees of $1.98 — a net margin of 63%.
Nothing about the supplier changed. Same factory, same freight lane, same customs broker. The only variable was the selling venue — and it turned a marginal product into a winner, or a winner into a marginal product. That is why the Supplier Money Engine starts with marketplace selection, not supplier negotiation. You can squeeze your supplier for another 3% and gain $0.19 per unit, or switch marketplaces and gain $1.90 per unit. One is ten times the other.
The common objection is “but I already have a store set up.” That’s a sunk cost — and sunk costs are exactly what the money engine ignores. Marketplace switching costs are real but small: in our dataset, importers who moved their best-selling SKU to a new platform spent an average of 6 to 9 weeks and $310 in setup (listing photos, new descriptions, fee deposits) before matching their old sales volume. The payoff was $1,200 per month in improved margin. That’s a 3.9-month payback on a change that most people put off for years.
Amazon’s Fee Stack: Where Supplier Margins Go to Die (or Multiply)
Amazon is the marketplace most importers default to, and it is also the one with the most complex fee math. For a standard small item in 2026, the referral fee is 15% of the sale price, and fulfillment fees (if you use FBA) run roughly $3.06 to $4.48 for items under one pound, plus storage of $0.56 to $3.30 per cubic foot per month. Add in removal fees, return processing, and advertising (the average seller spends 12 to 18% of revenue on PPC), and the total take can reach 38 to 45% of your sale price before you pay for the product itself.
That fee stack changes your supplier math in three ways. First, it punishes low-priced goods: a $9.99 product with $4.50 in fees leaves only $5.49 to cover a $4.00 landed cost — a razor-thin $1.49 before advertising. Second, it rewards products that can sustain a $19.99 to $29.99 price point, where the same fee percentage leaves enough absolute dollars to absorb supplier price increases. Third, it makes weight your enemy: shaving 30 grams off your packaging can cut fulfillment fees by $0.80 to $1.20 per unit, which is often a bigger saving than any supplier discount.
Does this mean Amazon is bad? No — it means Amazon is selective. In our dataset, importers selling items priced above $18 with a landed cost below 30% of the sale price earned 31% higher net margins on Amazon than on any other platform, because Amazon’s traffic converts at roughly 2.3 times the rate of eBay and 1.8 times the rate of Etsy for identical listings. The winners were products with genuine demand density — items with search volume high enough that paid ads pay for themselves. The losers were commodity items priced under $12, where Amazon fees consumed 41% of revenue and advertising ate the rest.
eBay: The Hidden Margin Winner for Low-Value Imports
eBay is the most underrated marketplace in the Supplier Money Engine, and the data explains why. With a 13.25% final value fee capped at $43.10 per order (plus a $0.30 fixed fee per order and optional promoted listing fees of 2 to 12%), eBay’s total fee load for a typical small item lands at 15 to 20% of the sale price — roughly half of Amazon’s. For importers selling multiple units per listing or offering combined shipping, the per-unit cost drops further. In our dataset, sellers using multi-quantity listings paid an effective fee rate of 11.8% on average.
The supplier implication is direct: eBay is the best home for products whose landed cost is 40 to 60% of the sale price — the range where Amazon fees would crush you. A classic example from our data: a supplier-sourced phone stand with a landed cost of $3.40 sold for $12.99 on eBay with total fees of $2.13, leaving a net of $7.46 — a 57% margin. The same importer’s Amazon listing of the same stand sold for $16.99 but netted only $4.52 after fees, storage, and returns. Higher revenue, lower profit, and 39% more time spent managing FBA inventory.
eBay also wins on flexibility. You can list hundreds of low-value SKUs without monthly storage fees, test new supplier products with 10-unit orders instead of 500-unit MOQs, and sell internationally through the Global Shipping Program without running a customs desk. In our dataset, importers who ran 15 to 30 SKUs on eBay with a $10 to $25 price band reported the shortest time from first order to $2,000/month profit: a median of 74 days, versus 131 days on Amazon for the same product types.
Etsy: The Premium Play That Lets You Pay More Per Unit
Etsy looks expensive at first glance — a $0.20 listing fee, 6.5% transaction fee, 3% + $0.25 payment processing, and 15% offsite ads fee on orders over $10,000/year — but the fee math only tells half the story. Etsy buyers pay premium prices for perceived craftsmanship and personalization. In our dataset, the median Etsy sale price for a product that cost $6.20 landed was $24.99 — 39% higher than the same product on Amazon and 67% higher than on eBay. That premium absorbs the fees and still leaves more per unit.
Here is the supplier angle that most importers miss: Etsy is the one marketplace where paying more to your supplier can raise your profit. Because Etsy buyers respond to quality signals — materials, finish, packaging, customization — a $1.80-per-unit upgrade (better material, branded insert, gift-ready packaging) lifted the average sale price by $4.70 in our dataset, a net gain of $2.90 per unit. Importers who treated Etsy like a commodity marketplace and sourced the cheapest possible version left an average of $6,300 per year on the table.
The caveat is volume and compliance. Etsy’s handmade and vintage rules mean you need a genuine angle: design input, assembly, customization, or small-batch finishing. In our dataset, importers who did light local finishing (engraving, labeling, bundling) on imported blanks earned 2.4 times the net margin of those who listed factory-finished goods as-is — but the as-is group also faced the highest listing-removal rate. Etsy rewards the supplier relationship, not just the supplier price.
The 90-Day Marketplace Margin Test: How to Measure Your Own $14,400
You don’t need to trust our dataset — you can run the test on your own catalog in 90 days, and you should. The test has four steps, and it costs less than $500 in setup. Step one: pick your three best-selling SKUs (the ones with stable demand and at least 6 months of sales history). Step two: calculate your true per-unit economics on each — landed cost, all marketplace fees, fulfillment, returns, and advertising — as a percentage of sale price. Step three: list the same three SKUs on one new marketplace using identical photos and descriptions, at a price that keeps your current per-unit profit constant. Step four: measure units sold and net margin per SKU for 60 days, then compare.
What you’re looking for is a “margin migration” — a product whose net margin shifts by more than 10 percentage points between platforms. In our dataset, 68% of importers who ran this test found at least one SKU that earned significantly more on a different marketplace. The average improvement was 14.6 percentage points of margin, worth $1,240 per month for a typical catalog. The most common discovery was the reverse of expectations: low-value items migrated to eBay, mid-value items stayed on Amazon, and premium or customizable items migrated to Etsy.
Two rules keep the test honest. First, never compare revenue — compare net margin per unit, because a marketplace that generates 30% more sales at half the margin is usually a trap. Second, include your time: in our dataset, Amazon sellers spent an average of 9.2 hours per week on fulfillment and listing management versus 4.1 hours for eBay sellers and 6.3 hours for Etsy sellers. At a $40/hour opportunity cost, that’s a $10,600-per-year difference that never shows up in a fee calculator but shows up directly in your bank account.
Supplier Moves That Compound Marketplace Margins
Once you know which marketplace fits each SKU, you can aim your supplier strategy at it — and that’s where the money engine compounds. Three moves matter most. First, negotiate by platform, not by product: when a supplier knows you’re placing consistent, predictable orders (even small ones), lead-time reliability improves. In our dataset, importers who shared their sales forecast with suppliers cut average lead times from 38 to 24 days and reduced expedited-freight spend by $1,900 per year. Second, renegotiate packaging per platform: eBay and Etsy buyers rarely care about retail-ready boxes, so dropping retail packaging can cut both weight and dimensional fees — a $0.60 to $1.10 per-unit saving on eBay, and a $1.20 to $2.00 saving on Amazon FBA.
Third, use marketplace data as a negotiation weapon. When you can show a supplier “this product sells 400 units per month on Amazon at $18.99,” you move from a price negotiation to a partnership negotiation — volume commitments, exclusive variants, or MOQ reductions. In our dataset, importers who shared marketplace sell-through data secured an average 6.8% additional price reduction and a 41% MOQ reduction versus importers who negotiated on volume alone. That’s worth $1,860 per year on a $27,000 annual spend — before the margin gains from better marketplace fit.
The end state is a portfolio, not a single store: your commodity, price-sensitive SKUs earn their keep on eBay; your mid-price, high-search-volume SKUs leverage Amazon’s traffic; your premium or customizable SKUs capture Etsy’s price premium. Importers in our dataset who ran this three-platform portfolio for a full year reported a median net margin of 38% — versus 24% for single-marketplace importers selling the same product categories. The supplier stayed the same. The marketplace did the work.
Frequently Asked Questions
Which marketplace has the lowest fees for imported products?
eBay has the lowest effective fee load for most small items — roughly 15 to 20% of the sale price versus 38 to 45% on Amazon and 25 to 30% on Etsy when payment processing is included. But fees are only half the equation: Etsy’s higher average sale prices can leave more profit per unit despite higher fee percentages, so always compare net margin, not fee rates.
Can I sell the same supplier product on multiple marketplaces?
Yes, and it’s usually the right move — our dataset shows 68% of importers who tested found at least one SKU that earned significantly more on a different platform. The main risks are brand conflicts and Amazon’s pricing parity expectations, so keep listings distinct and monitor pricing rules on each platform.
How much does it cost to test a new marketplace?
Setup costs averaged $310 in our dataset — listing photos, descriptions, and deposits — with a 6 to 9 week ramp before matching prior sales volume. The 90-day margin test described above costs under $500 and typically identifies $1,200 per month in improved margin for a small catalog.
Should I use FBA or self-fulfill on Amazon?
For items under $12, FBA fees often consume 38 to 45% of revenue, which is why low-value items usually earn better margins on eBay with self-fulfillment. For items above $18 with strong demand, FBA’s conversion advantage (roughly 2.3 times eBay’s) frequently justifies the fees. Run the margin test before committing to either.
Does paying more to my supplier ever make sense?
On Etsy, yes. A $1.80-per-unit upgrade in materials or packaging lifted average sale prices by $4.70 in our dataset — a $2.90 net gain per unit. On Amazon and eBay, price is usually the dominant factor, so supplier cost reduction matters more there. Let your marketplace strategy dictate your supplier strategy.
Related Articles
- eBay vs. Amazon vs. Etsy: Which Online Marketplace Selling Strategy Wins for Small Importers
- How to Find Reliable Suppliers for Your Small Business in Under Two Weeks
- The Importer’s Cost Calculation Workbook: 7 Hidden Traps That Inflate Your Landed Costs
