Value comes from recent sold prices for the same card in the same condition — not the highest asking price you can find. Check completed/sold listings on major marketplaces and price-tracking tools, and match the exact set, number, variant (holo, first edition, parallel), and grade. Condition is huge: a Mint copy can be worth many times a played one. For potentially valuable cards, grading establishes condition objectively. If you have a stack to value quickly, a local card shop can eyeball the keys for you. Be skeptical of round-number "book" values; the real number is what buyers are actually paying right now.
Updated Oct 11, 2026
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