SV: Prismatic Evolutions Teal Mask Ogerpon ex 177/131: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on SV: Prismatic Evolutions Teal Mask Ogerpon ex 177/131 is an unusually wide gem-mint premium: $88, with PSA 10 copies trading at 5.6x a PSA 9. Based on the most recent PSA 10 sale of $99.99 on May 28, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$106.90
Last sale $99.99 on
PSA 9
$19.03
Last sale $19.10 on
PSA 8
$13.13
Last sale $15.00 on
The Spread
The PSA 9 to PSA 10 spread on Teal Mask Ogerpon ex 177/131 (SV: Prismatic Evolutions).
$88
Dollar gap, PSA 9 to PSA 10
5.6x
PSA 10 sells for 5.6x 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
Where this card lands in the broader SV: Prismatic Evolutions picture: a modern-era card carrying an $88 gap between PSA 9 and PSA 10, a 5.6x multiple on the PSA 9 price.
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