Collectible resale profit calculator

Before buying a blind box or trading card to resell, ask two different questions: What has a comparable item actually sold for? and What remains after the entire transaction? A listing price is not proof of a sale, and a profitable-looking spread can disappear after shipping, taxes, fees, and risk.

Free resale margin check

A price can look like a bargain and still lose money after fees. Try your own what-if numbers. This calculator runs in your browser and does not submit or save the amounts.

Purchase priceWhat you pay for the itemInbound shippingShipping paid to acquire itPurchase taxSales tax paid when buyingExpected resale priceUse a plausible sale, not an unsold askSelling fees (%)Enter your actual platform/payment rateOutbound shippingPacking and postage you will payTarget profit (optional)Profit goal above all listed costs; defaults to zero

USD scenario estimate; excludes returns, chargebacks, income tax, and other possible fees. Marketplace rates vary. Not financial advice.

Three checks beyond the math

Compare completed sales for the same variant and condition. Asking prices are not completed transactions.
Check whether the evidence is recent and credible. One sale does not establish a stable market price.
Think about authenticity, returns, handling time, and liquidity; the calculator cannot predict an actual buyer.

For research with missing data clearly labeled, ask Mr. Know It All. To influence which collector tools are built next, join the free reseller alpha list.