Hidden Fates Mewtwo-GX 31/68: PSA 9 vs PSA 10
Hidden Fates Mewtwo-GX 31/68 shows a wide gem-mint premium between PSA 9 and PSA 10: a $76 dollar gap, with the gem mint multiplier at 4.2x. Based on the most recent PSA 10 sale of $131.50 on May 30, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$99.48
Last sale $131.50 on
PSA 9
$23.97
Last sale $22.68 on
PSA 8
$23.83
Last sale $20.00 on
The Spread
The PSA 9 to PSA 10 spread on Mewtwo-GX 31/68 (Hidden Fates).
$76
Dollar gap, PSA 9 to PSA 10
4.2x
PSA 10 sells for 4.2x a PSA 9
Three-Outcome EV Calculator
15%
70%
15%
Defaults are conservative starting points. Adjust based on the specific slab. A borderline 9 with strong centering plays differently than a 9 with edge wear.
PSA 10 outcome (sale price minus resub minus acquisition)
$0
PSA 9 outcome (regrade, no upgrade)
$0
PSA 8 outcome (downgrade, slower sell, tied capital)
$0
Expected Value
$0
Math favors holding the 9
Where this card lands in the broader Hidden Fates picture: a modern-era holo carrying a $76 gap between PSA 9 and PSA 10, a 4.2x multiple on the PSA 9 price.
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