How BinderDex calculates card prices

Where prices come from

Card prices on BinderDex come from recorded marketplace sales and listings across major trading-card venues, aggregated into a single market price per card. The headline number you see on a card, set, or list page is the raw (ungraded) near-mint market price for the card's highest-value printing variant.

Where a card has multiple variants — holofoil, reverse holo, 1st edition — each variant is priced separately, and variant breakdowns are shown on the card page.

How often prices update

Prices refresh continuously: market events trigger same-day updates, and a daily pass re-checks the rest of the catalog. Cards from the newest sets are refreshed on the tightest cycle — within six hours — because that's where prices move fastest. Every price-bearing page shows when its data was last updated.

Graded card prices

Graded prices (PSA, BGS, CGC, SGC) are tracked separately per grading company and grade, from graded-sale data. The card page shows the latest per-grade snapshot and historical trend, and the grading-economics section uses the PSA 10 and PSA 9 prices together with published PSA service fees to estimate whether grading a raw copy pays off.

Thin markets and outliers

Collectible markets are thin: a single unusual sale can swing a card's apparent value. We favor recent, repeated sales over one-off spikes, and where data is sparse the price reflects the most recent credible sale rather than an average of stale ones. Treat any price on a rarely-traded card as an estimate with wide error bars.

What these prices are — and are not

Prices are market context, not offers. BinderDex does not buy or sell cards, the numbers are not buylist quotes, and nothing here is investment, financial, or grading advice. Spotted a price that looks wrong? Email support@binderdex.com and we'll check it against the underlying data.