Good comps match the card’s identity, variation, condition and grade as closely as possible.
Put this guide to work
Use the details you have confirmed to research your card. Leave uncertain fields unconfirmed.
Research your card →What is a sports card comp?
A comp is a completed sale used to understand what buyers recently paid for a comparable card. It is evidence, not a guaranteed future price.
Build the search
Search in this order: year, brand, set, player, card number, parallel, grader and grade. Put the rarest distinguishing detail in the query when results are noisy.
Filter the results
Remove wrong parallels, grades, autographs and lots. Check photos because listing titles can be incomplete or incorrect.
- Same card number
- Same parallel or variation
- Same raw/graded status
- Similar condition
- Recent sale date
Use more than one source
Compare marketplace sold filters, grading-company auction archives and reputable auction houses. Each source covers a different part of the market.
Handle outliers
A single result far above or below the others may be a mislabeled variation, damaged copy, combined lot or unusual bidding event. Investigate before excluding it and keep a note of your reasoning.
Good comp vs bad comp
A good comp matches the same year, set, card number, parallel, serial tier, autograph type, grade or similar raw condition, and a recent sale date. A bad comp changes one of those identity fields, comes from a lot, relies on an asking price, or is too old for the current market.
- Good: same card and parallel, same grade, recent completed sale
- Good with caveat: adjacent serial tier, clearly labeled as an estimate
- Bad: base card used for a numbered parallel
- Bad: PSA 10 used for a raw card
- Bad: active listing or unexplained outlier
FAQ
How many comps do I need?
Three to five close recent sales can be useful; more evidence is better when the market is active.
Are active listings comps?
They show seller expectations, not confirmed buyer demand, so keep them separate from sold comps.