Base Set Charizard #4: PSA 9 vs PSA 10
Base Set Charizard #4 shows one of the widest gaps in vintage WOTC between PSA 9 and PSA 10: a $26,679 dollar gap, with the gem mint multiplier at 8.8x. the crack-and-resub math favors the resub: expected value is positive even at a conservative 15% upgrade probability.
The Spread
The PSA 9 to PSA 10 spread on Charizard #4 Base Set.
The Cross-Grade Read
Where this card sits across grade tiers, and against its own set.
At 8.8x, the gem-mint premium on this card is an unusually wide gap versus the Base Set median of 3.6x, approximately the 8th-widest gem-mint gap of 94 priced Base Set cards.
The grade is doing the heavy lifting on price here: a PSA 10 trades at 8.8x a PSA 9. It ranks approximately 8th of 94 in the set for gem-mint spread, an unusually wide gap against the 3.6x median.
Three-Outcome EV Calculator
Base Set #4 Charizard Holo released in 1999 sits in the vintage WOTC tier where gem-mint premiums above $26,679 are common. PSA 10 populations shrink faster than supply on cards of this era, which is why the upgrade arbitrage stays alive.
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