SV: Prismatic Evolutions Walking Wake ex 178/131: PSA 9 vs PSA 10
SV: Prismatic Evolutions Walking Wake ex 178/131 shows a wide gem-mint premium between PSA 9 and PSA 10: a $54 dollar gap, with the gem mint multiplier at 3.6x. Based on the most recent PSA 10 sale of $87.50 on May 29, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$74.39
Last sale $87.50 on
PSA 9
$20.48
Last sale $25.00 on
PSA 8
$14.75
Last sale $16.99 on
The Spread
The PSA 9 to PSA 10 spread on Walking Wake ex 178/131 (SV: Prismatic Evolutions).
$54
Dollar gap, PSA 9 to PSA 10
3.6x
PSA 10 sells for 3.6x 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 178/131 Walking Wake ex is a modern-era release from 2025. The gap between its PSA 9 and PSA 10 prices is $54.
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