The Pikachu Illustrator is the clearest example: a PSA 10 sold for $16.5 million, while PSA 9 copies sit around $840,000 and PSA 78 examples fall between roughly $375,000 and $480,000 (CardsnPacks tracks this spread)
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With SAR odds at roughly 1-in-6 boxes and the Japan-exclusive Master Ball mirror locked at one random card per box out of 153 possibilities, the math creates scarcity that drives serious value
in the case of something like lugia vstar, sometimes you WANT to discard cards from your hand i could still see this card seeing play in some anti-meta deck at some point in the future, because the secondary effect can be really good depending on the meta #20 Powering up Dark isn't that hard with Galarian Moltres V (with energy switch) and Dark Patch
While the card got horribly pricey as a result, a reprint in Innistrad Remastered has made him a little less silly to buy