SV: Prismatic Evolutions Goldeen 20/131: PSA 9 vs PSA 10
On SV: Prismatic Evolutions Goldeen 20/131, PSA 10 sells for 4.6x a PSA 9, a $47 delta, which is a wide gem-mint premium. Based on the last tracked PSA 10 sale of $59.99 on Nov 4, 2025, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$59.99
Last sale $59.99 on
PSA 9
$13.01
Last sale $13.01 on
PSA 8
—
Limited recent sales tracked. Pull eBay sold comps before acting.
The Spread
The PSA 9 to PSA 10 spread on Goldeen 20/131 (SV: Prismatic Evolutions).
$47
Dollar gap, PSA 9 to PSA 10
4.6x
PSA 10 sells for 4.6x 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
SV: Prismatic Evolutions 20/131 Goldeen is a modern-era release from 2025. The gap between its PSA 9 and PSA 10 prices is $47.
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