Almost every China sourcing guide is written for an Amazon FBA seller: 1,000 units, one SKU, one container, one prep center. eBay sellers inherit that advice and it quietly bankrupts them, because eBay rewards a different set of supplier behaviours.
I have spent 21 years on the factory side of this trade, quoting everything from 50-unit trial orders to 40-foot containers. The eBay sellers who do well share one habit: they brief the factory for the parcel, not for the pallet. This guide is that brief, written out.
Why eBay Changes the Sourcing Brief
On Amazon, the risks that cost real money are stockouts and inventory metrics. On eBay they are a late shipment, a case opened as "item not as described", and a listing that misrepresents what arrives in the box. All three are sourcing decisions made months before the sale.
That inverts the priorities. Container utilisation stops mattering. Per-unit packed weight starts mattering enormously, because you pay parcel postage on every sale, forever. Packaging that survives a pallet is not packaging that survives a mail bag and a doorstep.
| Decision | Amazon FBA brief | eBay brief |
|---|---|---|
| First order size | 500–2,000 units per SKU | 100–300 units per SKU, repeat if it works |
| Inbound freight | Sea LCL or FCL, 30–45 days | Air or consolidated air, 7–15 days on run one |
| What you optimise | Carton cube and cost per unit landed | Packed weight, packed dimensions, scannable barcode |
| Packaging spec | FNSKU label, poly bag, prep-center friendly | Retail-ready, mail-safe, resaleable after a return |
| Variation risk | Parent-child variation, one hero colour | Many variations, each needing its own photo and stock count |
| Costliest failure | Stockout during a ranking push | Item-not-as-described case and a forced return |
| Returns posture | Platform handles it, you absorb the fee | You handle it, both directions, often with postage |
| Supplier data you must collect | Carton dims, carton weight, HS code | All of that, plus unit dims, unit weight, barcode format, spares |
The Five Gates a Product Must Pass
Before you request a quotation, run the product through five filters. Most fail at gate two or three, and finding that out after a deposit is expensive.
Gate 1 — Selling price floor
Work backwards. eBay takes a variable final value fee plus a fixed per-order component, and promoted listings take more; postage, packaging and expected returns sit on top. Below roughly $15–20 retail the fixed costs eat the contribution margin unless the item is light. Run the real fee arithmetic for your category and store level before committing — the percentages vary by category and change, which is why eBay publishes a fee calculator.
Gate 2 — Packed weight and volume
This gate kills more eBay products than anything else. A product weighing 350 g packed ships profitably as a small parcel. The same product with a display stand and rigid gift box weighs 900 g and bills at dimensional weight because the carton is 40 cm long. Nothing about the product changed; the margin disappeared.
So ask at quotation stage: packed weight per unit, and packed dimensions per unit. Not per export carton — per sellable unit. Factories answer the carton question instantly and the unit question slowly, and that hesitation tells you whether they have ever shipped direct to a consumer.
Gate 3 — Case and return exposure
Anything judged subjectively is a return risk: colour accuracy, hand-feel, scent, fit, "looks smaller than the photo". Hard goods with objective specs — a cable, a bracket, a gasket — generate far fewer cases than soft goods carrying a colour claim. If customer judgement decides satisfaction, your brief needs measurement tables and a colour standard, not just a product photo.
Gate 4 — Compliance load
Some categories carry documentation obligations that are cheap to satisfy once and ruinous to discover late: children's products, anything with a battery, food-contact items, electrical goods, lasers, and health or safety claims. If your product lands there, price the testing into the product and confirm requirements against the official text for your destination market rather than a supplier's assurance.
Gate 5 — Intellectual property exposure
eBay removes listings on rights-holder complaint, and a removal with an account defect is worse than a product that never sold. Character licences, brand logos, patented mechanisms and trade dress are common traps in the trending-product lists that circulate in sourcing groups. If you cannot point to where the design came from, do not list it.
| Product profile | Packed weight | Case risk | Verdict for a first order |
|---|---|---|---|
| Small accessory, objective spec | Under 400 g | Low | Best entry point — cheap to post, easy to describe accurately |
| Consumable with repeat purchase | Under 600 g | Low to medium | Strong — repeat buyers lower acquisition cost |
| Apparel and footwear | 300–900 g | Very high (fit) | Only with a real size chart and honest fit notes |
| Home decor with a colour claim | 700 g–3 kg | High | Test 100 units before you believe the photos |
| Electronics with a battery | Any | Medium to high | Compliance and paperwork first, margin second |
| Oversize or bulky | Over 5 kg | High (damage) | Avoid as a first SKU; parcel economics break |
The Supplier Brief eBay Sellers Actually Need
Most first messages ask for a price and an MOQ. That gets you a price for the product the factory imagines, not the one you need to sell. Replace it with a brief that answers what your listings and postage will ask later.
- Unit-level physicals. Packed weight and dimensions for one sellable unit in its shipping packaging. Ask for a photo of the unit on a scale.
- Barcode readiness. Can they print and apply your UPC or EAN where your 3PL needs it, and verify it scans before cartoning? Ask for a scan test, not an assurance.
- Retail-ready packaging. Poly bag with the correct warning text, header card, hang tag or plain carton — specify which, because the default is whatever they used for the last customer.
- Drop and compression spec. Ask for the carton to survive a drop test to the specification your 3PL publishes, and ask what they changed to pass it.
- Spare parts. 2–5% of the failure-prone component in the same carton. The cheapest return-prevention tool you will ever buy.
- Re-order window. Days from purchase order to ex-factory for a repeat run, same SKU, same materials. Sellers routinely plan restocks on the first-order number instead.
- Change control. Written confirmation that components, materials and tooling will not change between runs without approval. Silent substitution is the most common cause of a second order that suddenly generates cases.
- Tooling ownership. If you pay for a mould, get in writing that the tool is yours and can be moved.
If you cannot yet tell whether a quotation is FOB, EXW or DDP, read the Incoterms guide for China importers before comparing prices. Two quotes in different terms are not comparable, and the gap is usually bigger than the discount you are negotiating.
Order Sizing: The Math That Decides Your First Run
eBay sellers are told to order small. That is directionally right and useless without numbers, so here is the arithmetic with explicit assumptions. Treat the per-unit figures as illustrative — substitute your own quotation, freight rate and duty rate.
| Line item (illustrative) | 100 units by air | 300 units by air | 1,000 units by sea LCL |
|---|---|---|---|
| Ex-works unit cost | $6.00 | $5.70 | $5.20 |
| Freight per unit | $2.80 | $2.30 | $0.65 |
| Duty and clearance per unit (assumed 12% of goods value) | $0.72 | $0.68 | $0.62 |
| Landed cost per unit | ≈ $9.52 | ≈ $8.68 | ≈ $6.47 |
| Cash tied up | ≈ $952 | ≈ $2,604 | ≈ $6,470 |
| Time to saleable stock | 2–3 weeks | 3–4 weeks | 8–10 weeks |
| What it buys | Real feedback and case data | Depth for a good week, plus a second variation | Lowest unit cost, highest risk if the listing misses |
The 100-unit air order costs about $3 per unit more than the container — roughly $300 on the whole run. That is a rounding error against discovering, after ten weeks and $6,500 of stock, that the packaging breaks or the colour is wrong. Pay the premium on run one; move to sea once you have a proven conversion rate and a repeat-order history.
The exception is a product with a hard seasonal window. If the season is six weeks long, air is not a premium, it is the only option that gets you a season at all.
Fulfillment Models, Compared Honestly
Where the stock sits determines your handling time, returns address and cash cycle. eBay measures handling time and late shipment rate, so this is a listing-quality decision, not a logistics detail.
| Model | Handling time you can promise | Returns experience | Best for | Main trap |
|---|---|---|---|---|
| Ship direct from the Chinese supplier per order | 7–20 business days | Slow and weak — buyer ships back to China or not at all | Long-tail SKUs you cannot afford to stock | Tracking disputes you lose on timing |
| Stock in China, 3PL ships direct | 5–15 business days | Same weakness, slightly better packed | Testing whether a SKU sells at all | Return cost kills cheap items |
| Bulk into a destination 3PL | 1–2 business days | Domestic address, fast, resaleable stock | Anything selling more than a few units a day | Storage and receiving fees on slow movers |
| Hybrid: fast movers stocked, tail direct | 1–2 days for the core, longer for the tail | Good where it matters, acceptable elsewhere | Mature stores with a wide catalogue | Two stock datasets drifting apart |
Comparing landed cost across these options gets messy fast: goods, freight, duty, receiving, storage, pick-and-pack and cost of capital all land on different lines. Use the calculators on our B2B tools page, then reconcile the output against one real shipment. A model that has never met an invoice is a guess with decimal places.
Returns and Item-Not-As-Described
Ask a hundred eBay sellers where the margin went and most say fees or advertising. Look at the numbers and it is usually returns, specifically cases where the buyer said the item was not as described.
Those cases cost three times: you refund, you often pay return postage, and you take a defect hit that reduces search visibility — losing sales you never see in a report. The defence is set at the sourcing stage and costs almost nothing.
- Photograph the actual production sample, not the factory's render. Every colour difference you hide becomes a case.
- Publish a measurement table with tolerances. "Approximately 30 cm" invites a case; "30 cm ± 0.5 cm, measured as shown" does not.
- State what is not included — batteries, screws, a stand. Many cases are buyers expecting an accessory that was never in the box.
- Ship spares. A $0.30 part in the carton prevents a $25 return.
- Package for resale. If a returned unit cannot be sold again, every return costs the full unit.
- Keep one sealed reference unit per run. When a buyer claims the product changed, you have evidence rather than an argument.
The 2% rule. If you cannot get spare parts at 2% of order quantity, and cannot re-run the SKU in under 30 days, your listing has no repair path. On eBay the first bad batch then becomes a permanent defect rate, because you cannot fix it fast enough to stop the cases.
Quality Control Scaled to Order Size
A 100-unit order does not justify a full inspection programme; a 1,000-unit order is reckless without one. Match the inspection to the money at stake.
- Under 200 units: a pre-shipment video of the carton being packed, with the scale visible. Cheap, fast, and it catches most packing errors.
- 200–1,000 units: pre-shipment inspection on a sampling basis, checking function, packaging, barcode scan and carton mark. The process is set out in our guide to quality control and factory inspection.
- Repeat orders: inspect the first run of every new batch, even from a trusted supplier. Substitution happens between runs, not within them.
- Always: have the inspector scan your barcode with a real scanner and photograph the result. A barcode that will not scan at the 3PL is a stockout you caused yourself.
Restocking: Plan in Weeks, Not in Feelings
A restock cycle has four clocks running at once: production, transit, inbound receiving, and the supplier's own material lead time. Sellers plan on the first and forget the fourth.
| Stage | Typical repeat-order range | What shortens it | What lengthens it |
|---|---|---|---|
| PO to production start | 3–10 days | Deposit same day, materials held | Waiting on deposit or colour approval |
| Production run | 20–35 days | Small quantity, simple assembly, stock components | Custom packaging, printing, Spring Festival window |
| Air freight to 3PL | 7–15 days door to door | Pre-booked space, clean paperwork | Battery paperwork, customs queries, peak backlog |
| Sea LCL door to door | 30–45 days | Booked before peak, consolidated | Port congestion, missing documents, holidays |
| 3PL receiving | 2–7 days | Correct carton labels, advance notice | Unlabelled cartons, barcode disputes, peak queue |
Two dates break this timetable every year. The Spring Festival shutdown in early 2027 removes two to four weeks of capacity, plus a week either side while workers travel. The Q4 parcel peak slows both air capacity and 3PL receiving at exactly the moment a seasonal SKU needs speed. If your product sells in November and December, the purchase order belongs in the summer.
Six Mistakes That Repeat Every Year
- Briefing for the pallet. Optimising carton cube on a product sold one unit at a time. The freight saving is real; the parcel cost is permanent.
- Believing the first-order lead time. Planning restocks on a number that included tooling, sampling and material sourcing.
- Ordering depth on an unproven listing. Five hundred units of a product with no reviews and no photo of the real thing.
- Skipping unit-level data. Discovering packed weight after the listing is live, when postage is already priced into every sale.
- Treating packaging as decoration. A beautiful box that fails a drop test costs more than the sales it wins.
- No spares, no re-order window. The product is fine until the first defect, and then there is no recovery path.
The Bottom Line
eBay is a parcel business, and parcel businesses are won on the details factories do not volunteer: packed weight, packed dimensions, barcode scannability, spare parts, and a repeat-order lead time you can plan against. Get those five into your first supplier message and you are ahead of most of the sellers you compete with.
Then start with one product, 100 to 300 units, air freight, honest photographs and a measurement table. Sell it, count the cases, and only then decide whether it deserves a container. That sequence costs a few hundred dollars more per run than the ambitious version, and it is the cheapest tuition in this trade.
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