CardboardDex editorial · 2 min read · Reviewed Oct 12, 2026
Check what the number represents
CardboardDex combines TCG API catalog and market observations with matched eBay active listings. A market observation is a reference point. An eBay asking price is what a seller requests, not proof that a buyer paid that amount.
Before comparing, match the card's set, number, language, printing, and condition. Check whether you are viewing a raw single, a graded card, or a sealed product. Similar names do not make those prices interchangeable.
Check the date and gaps
Use the displayed price timestamp and freshness indicator. A recently checked product can still carry an older price observation. An empty chart or unavailable price means the site lacks usable data; it is not a zero-dollar valuation.
A percentage change also needs a comparison period. The sealed tools distinguish 30-day and 90-day changes, and available history may differ by product. Compare consistent periods and pay attention to missing baselines.
Understand your profile and binder totals
On a Pokémon profile, the summary follows the currently displayed list after filters. Highest value excludes sealed products, while total displayed price sums known prices in the visible list. It is not a valuation of every card ever printed for that Pokémon.
Binder estimates depend on saved card IDs and available prices. A displayed estimate is not an offer to buy your collection. Sale proceeds can differ after shipping, marketplace fees, taxes, and the actual condition of your cards.
Sources & editorial notes
Original CardboardDex guidance. Website descriptions reflect the current implementation; card-care suggestions are general collecting practices.
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