Short answer
The quick math
For a $24 Mercari item with $7.99 buyer-paid shipping, the current 10% selling-fee assumption applies to $31.99, so the estimated selling fee is about $3.20. Before item cost, that leaves about $28.79 from the item plus buyer-paid shipping flow.
Assumptions used
- $24 item price
- $7.99 buyer-paid shipping
- 10% selling fee
- Fee base includes item price plus buyer-paid shipping
Use it before you decide
- Include buyer-paid shipping in the calculator when Mercari's current fee base includes it.
- Subtract your item cost to see actual resale margin.
- Compare with Poshmark and eBay because each platform treats shipping and tax differently.