FREE RESELLER TOOL · THE WEEKEND HUNT

Know your profit before you buy.

A practical calculator for thrift finds, garage-sale treasures, eBay listings and Whatnot sales. Adjust the numbers for your actual fees and shipping costs; the results update instantly.

Your sale details

Amounts in USD

Start with our example and replace the numbers with your own. All fields are editable, including the marketplace fee rates.


1 Sale & purchase

2 Fulfillment costs

3 Marketplace fees
Fee estimate: percentage charges are applied to item price + buyer-paid shipping + sales tax. Your marketplace's actual fee rules, category rates, caps, advertising fees and taxes can differ. Verify your statement for exact profit.

What counts as profit?

Money from the buyer, minus item cost, postage, packing, platform fees, advertising, and other expenses. Sales tax collected and remitted by the platform is not your revenue.

Profit vs. ROI

Profit is your estimated dollars earned. Margin measures profit against sale revenue. ROI compares profit with the purchase and fulfillment costs you put in.

Use it while sourcing

Check sold comps, estimate shipping conservatively, and enter your desired profit. The max-buy figure helps you decide whether the item is worth picking up.