You find a vintage Pyrex bowl for $8. Sold comps say $30. That's a $22 spread, and $22 for a bowl you can carry out in one hand sounds like an easy yes.
Then you ship it. Glass, double boxed, packing paper, and the post office wants $13.27. eBay wants $4.08, plus 40 cents on every order. Suddenly your $22 is $4.25, and you spent twenty minutes packing it.
Shipping is the deduction resellers guess at, and it is the one that decides the most buys. So we stopped guessing and measured it.
What we measured
We pulled recent eBay sold listings across ten common thrift categories and took the median shipping actually charged, counting only listings that charged for shipping. Free-shipping listings are excluded, because there the seller absorbed the cost into the price rather than avoiding it.
Sample sizes are in the last column. Pulled August 2026.
| Item | Median shipping | Priced listings |
|---|---|---|
| Retired LEGO set | $9.02 | 91 |
| Patagonia fleece | $8.99 | 67 |
| Sony Walkman | $9.45 | 57 |
| Coach handbag | $9.72 | 96 |
| Vintage Levi's 501 | $10.03 | 72 |
| Carhartt jacket | $10.43 | 70 |
| Nintendo 64 console | $13.27 | 67 |
| Vintage Pyrex bowl | $13.27 | 95 |
| Cast iron skillet | $13.66 | 90 |
| KitchenAid stand mixer | $32.50 | 38 |
The thing that jumps out
Nine of those ten sit between $9 and $14.
Shipping is close to flat. It tracks weight and box size, not price. A $30 bowl and a $94 game console cost almost the same to send, because the post office does not care what is inside.
That single fact is why cheap flips die.
- $13.27 shipping on a $30 Pyrex bowl is 44% of the sale price.
- $13.27 shipping on a $94 Nintendo 64 is 14% of the sale price.
Same postage. Wildly different damage. Every dollar of shipping hurts three times as much on the cheap item, and cheap items are most of what is on a thrift shelf.
The rule of thumb
Under about $25 sold, shipping and fees together eat roughly half. Over about $75 sold, they settle down near a quarter. The cheap stuff is not a smaller version of the good stuff, it is a different math problem.
Then there's the heavy one
KitchenAid stand mixers charge a median of $32.50 to ship. That is not a rounding error on a $139 sale, it is 23% of the sale price gone before eBay takes its 13.6%.
Run the whole thing:
- Sale price: $139.00
- Final value fee (13.6%): −$18.90
- Per-order fee: −$0.40
- Shipping: −$33.00
- Cost of goods: −$40.00
Net profit: $46.70. A 33.6% margin, which is a real flip. But notice that shipping cost you more than eBay did. On heavy items the post office is your biggest partner, and most resellers never price it that way.
What this changes about sourcing
Three habits fall out of the numbers.
Weigh it in your hand before you do any other math. You already know what a heavy box feels like. That instinct is worth more than a spreadsheet, because it tells you which bucket you are in before you even pull comps.
Set a floor. If an item sells for under about $20 and is not small and light, the shipping alone makes it a no. Not a maybe. Walking past those is a skill, not a missed opportunity.
Stop using a flat shipping guess. Most resellers plug in one number for everything. The table above spans $9 to $32.50, and using $9 for a stand mixer is how a PASS gets mistaken for a FLIP.
The verdict
Shipping does not scale with price, so it punishes cheap items and rewards dense, valuable ones. That is most of the answer to why two items with the same spread can be opposite calls.
Flip or Pass runs real median shipping for the item you are looking at, not a flat guess, along with the exact category fee. Type the item and what they are asking, and you get the net and a FLIP or PASS before you carry it to the register. Try it free, one verdict without an account.
Shipping medians are from recent eBay sold listings pulled in August 2026, counting only listings that charged for shipping. Postage changes, so treat these as the shape of the problem rather than a permanent price list.