The real cost of flipping an item on eBay (and how to stop guessing)
Most eBay resellers count two things: what they paid for the item and what eBay took in fees. That math produces a number that feels like profit. It is not profit.
Here’s every cost that actually eats your margin — and how to track them without losing your mind.
The costs your dashboard ignores
Purchase price. This one you know. But a lot of sellers mentally anchor on what they remember paying, not what the receipt says. Write it down at the sourcing run.
eBay final value fee. Currently 13.25% on most categories (electronics are lower, some collectibles are higher). eBay’s dashboard does show this — but it shows it on the gross sale, not the net you’ll actually receive.
Shipping label. If you use eBay Managed Payments shipping, this is deducted automatically. If you use Pirate Ship or USPS directly, it’s invisible to eBay’s reporting and invisible to most trackers. It still costs you money.
Packaging materials. Bubble wrap. Poly mailer. Packing tape. Tissue paper. These are real per-item costs. A single poly mailer runs $0.15–$0.40. For a hundred items a month, that’s $15–$40. You paid for it. It should count.
Your time. This is the one people fight me on. “I like doing it, it doesn’t feel like work.” That’s great. It’s still an economic cost. If you spend 25 minutes cleaning, photographing, and packing an item that nets you $8 after everything else — and your time is worth $15/hr — that’s $6.25 of labor on a $8 return. You made $1.75. Not $8.
Mileage. Driving to Goodwill, the post office, an estate sale. The IRS mileage rate in 2026 is $0.70/mile. A 10-mile round trip is $7.00. That sourcing run has a real cost.
Supplies and overhead. Label printer, shipping tape dispensers, photography backdrop, storage bins. These aren’t per-item costs — they’re business costs. They still need to come off your annual profit somewhere.
What the real math looks like
Example: Vintage Pyrex bowl set, bought at Goodwill.
| Cost item | Amount |
|---|---|
| Purchase price | $8.00 |
| Bubble wrap (2 sheets) | $0.80 |
| Poly mailer | $0.25 |
| Tissue paper | $0.15 |
| Labor — 25 min at $18/hr | $7.50 |
| eBay final value fee (on $65 sale) | $8.61 |
| Shipping label | $6.50 |
| Total cost | $31.81 |
| Sale price | $65.00 |
| Net profit | $33.19 |
| Margin | 51% |
Not bad. But not the $65 − $8 − $8.61 = $48.39 your eBay dashboard implied. That’s a $15 gap — on one $65 item. Scale to 300 items a year and you’ve been off by thousands.
How to stop guessing
The real answer is a cost-tracking system that captures these numbers without making it a second job. That’s what ResaleTruth is built for. But even if you use a spreadsheet:
- Log cost basis at acquisition. Take a photo of the receipt or write the price on your phone while you’re still in the store. It takes ten seconds and it’s the most important number you’ll enter.
- Create a packaging template. Pick your three or four most common packaging configurations and pre-calculate the total materials cost. Apply the right one per item rather than calculating from scratch each time.
- Pick an hourly rate and stick to it. It doesn’t have to be the “right” number — it just has to be consistent. $15, $20, $25. Log your time per item for one month and see what it tells you.
- Add mileage as a business expense. Even if you don’t log per-item, log per-trip. At $0.70/mile, sourcing trips add up fast.
The goal isn’t perfect accounting. The goal is knowing whether this is working — which category is profitable, which sourcing location pays off, which item size you should stop buying. You can’t see any of that if your cost data is “purchase price + vague awareness of eBay fees.”
Track your real costs free with ResaleTruth — start here.