Card buying tools
Check the Numbers Before You Buy.
Estimate selling profit, compare grading costs, and understand what a card purchase could cost you. Start with free tools, with no account required.
Free tools
Working calculators, no signup
What the numbers include
Every cost, labelled
Acquisition costs
Purchase price, purchase taxes and buyer fees, inbound shipping, and any grading or preparation spend before listing.
Selling costs
Percentage fees on a fee base you choose, fixed fees, actual outbound shipping and insurance, and other direct costs.
Grading expenses
Per-card fees, shipping both ways, insurance, and batch-level membership costs allocated across the cards.
Clearly labelled assumptions
Marketplace-collected sales tax is excluded from proceeds. Income tax, overhead, and your time are not included. Results are arithmetic on your inputs.
Worked example
A transparent calculation
Illustrative example, not a real trade
Suppose a card's total acquisition cost is $350 and it sells for $500 with no shipping charged to the buyer. The marketplace fee is 15% of the item price, outbound shipping costs $15, and other direct costs are $10.
| Gross proceeds | $500.00 |
| Selling fee (15% of $500) | $75.00 |
| Outbound shipping | $15.00 |
| Other direct costs | $10.00 |
| Total acquisition cost | $350.00 |
| Estimated profit | $50.00 |
| Return on acquisition cost (50 ÷ 350) | 14.29% |
| Profit as % of proceeds (50 ÷ 500) | 10.00% |
| Break-even item sale price | $441.18 |
A sale that looked like a $150 gain leaves $50, and any item price below about $441 loses money under these fee rules. Run it with your own numbers.
Card alerts: in development
Looking for a Specific Card?
We are developing personalized card watchlists and listing alerts. The intended workflow: choose a specific card or a clearly defined search, set version, language, condition, grade, and budget, pick supported sources, review matching listings, then open the original listing and decide for yourself.
This feature is not available yet. Joining the list does not start any monitoring. We will publish supported sources and refresh expectations when it launches.
Join Early AccessHow our estimates work
Every formula, the fee-base options, and what the calculators cannot tell you are documented in plain language.