SV: Prismatic Evolutions Goldeen #20: PSA 9 vs PSA 10
On SV: Prismatic Evolutions Goldeen #20, the PSA 10 premium is a wide gem-mint premium: PSA 10 sells for 4.6x a PSA 9, a $47 delta. 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 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 Goldeen released in 2025 sits in the vintage WOTC tier where gem-mint premiums above $47 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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