Sold-comps methodology

Values are drawn from eBay sold (completed) listings, transactions where a card actually changed hands. We do not use active listings, Buy-It-Now asking prices, or aggregated price-guide values. Every displayed value links back to the source sales beneath it.

A sale is only attached to a card when it matches on year, manufacturer and set, player, card number, grader, and grade. Sales with ambiguous titles or uncertain card numbers are not force-matched; we would rather show a smaller, correct sample than a larger, noisy one.

We exclude lots and multi-card listings, reprints and reproductions, altered or trimmed cards, and unopened products, because none of them represent the single graded card on the page. Autographed and serial-numbered variants are treated as their own cards, not blended into the base card, unless the page explicitly represents them.

Within each grade we report the mediansale, which resists distortion from a single unusually high or low result far better than a mean. Prices are grouped by grader and grade (a PSA 9 and an SGC 9 are separate rows), because a graded card's price is only comparable to the same grade.

When a single grade has four or more sales, we set aside clear outliers before taking the median: sales below one-third of, or above three times, the within-grade median are excluded and counted in the "outliers set aside" figure. With fewer than four sales we keep every sale and let the confidence level, not silent trimming, tell you the sample is thin.

Every grade row and the card's headline carry a confidence level based on how much repeated evidence exists:

• High: five or more sales of the same grade with no unresolved outliers. A reliable read.
• Medium: two to four sales of the same grade. Suggestive, but treat it as a small sample.
• Low: a single sale or highly inconsistent prices. A data point, not a market price.

Confidence reflects sample size and within-grade price consistency, the things we can measure from the sales themselves. It is not a promise that a listing was matched perfectly; that is why we always link the source sale so you can check.

We never call a single sale a "typical price." A lone sale is shown as "one verified sale observed." We do not show price trends, momentum, or volatility for a card whose sample is too thin to support them, and we prefer ranges to point estimates when data is sparse.

Reported figures are the sale prices as recorded by the marketplace. They are not adjusted for shipping, taxes, or seller fees. Treat them as sale-price reference points, not net-to-seller or all-in buyer costs.

Comps are refreshed on a rolling basis, prioritizing the most-viewed cards. The "last checked" date shown beside each card is the date of the most recent sale in that card's sample, the honest indicator of how current it is.