SV: Prismatic Evolutions Wellspring Mask Ogerpon ex 27/131: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on SV: Prismatic Evolutions Wellspring Mask Ogerpon ex 27/131 is a modest premium: $2, with PSA 10 copies trading at 1.1x a PSA 9. Based on the last tracked PSA 10 sale of $24.26 on May 5, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$25.01
Last sale $24.26 on
PSA 9
$23.50
Last sale $30.00 on
PSA 8
$8.76
Last sale $8.76 on
The Spread
The PSA 9 to PSA 10 spread on Wellspring Mask Ogerpon ex 27/131 (SV: Prismatic Evolutions).
$2
Dollar gap, PSA 9 to PSA 10
1.1x
PSA 10 sells for 1.1x 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 SV: Prismatic Evolutions picture: a modern-era card carrying a $2 gap between PSA 9 and PSA 10, a 1.1x multiple on the PSA 9 price.
More Wellspring Mask Ogerpon Comparisons
Other SV: Prismatic Evolutions Heavy Hitters
Track every grade tier. Spot every gap.
Real PSA prices across every grade tier. Free during beta.
Get Free Beta AccessFounding Member Cohort · Limited to the First 100 Members.