How to Store Pokémon Cards So They Don't Lose Value
Damp is what writes off collections — mold can start in about two days at 90% humidity. Light, pressure and PVC are slower. The fixes cost very little.
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Plain-English guides to valuing, grading, and selling Pokémon cards — written by people who buy collections for a living.
Everything below comes out of questions people actually ask us when they submit a collection. No hype, no “this card is going to the moon” — just how to work out what you have and what it’s realistically worth.
Damp is what writes off collections — mold can start in about two days at 90% humidity. Light, pressure and PVC are slower. The fixes cost very little.
A heavy 1999 Base Set pack sold for $1,650 in August 2026. An ordinary one sold for $760. Here is what weighing a pack tells you, and what it can't.
PSA's Value tier is paused, so a modern card now starts at $79.99 to grade. Here is the arithmetic on which cards clear that bar, and which lose money.
eBay and TCGplayer take almost the same cut. The real cost of selling a collection yourself is the transaction count — here is the arithmetic.
Where the set symbol sits on a Pokémon card, how it moved three times since 1999, and how to read the collector number and regulation mark next to it.
Seven in-hand checks that tell you whether a Pokémon card is counterfeit, no tools required. Plus the real cards people mistake for fakes every week.
Three different cards share the name. One is worth about $500 raw, one about $1,000, one about $5,500 — and telling them apart takes ten seconds.
Grading adds value to some cards and destroys money on others. Here's the arithmetic that tells you which is which, before you spend anything.
A step-by-step method for valuing a Pokémon collection you didn't buy yourself — including the three cards that carry most of the value in a typical 1999–2003 binder.
Four checks that separate a shadowless Base Set card from an unlimited print, plus the 1st Edition stamp everyone looks for and half of people misidentify.