SV: Scarlet & Violet 151 Mr. Mime #122: PSA 9 vs PSA 10

On SV: Scarlet & Violet 151 Mr. Mime #122, the PSA 10 premium is one of the widest gaps in vintage WOTC: PSA 10 sells for 12.4x a PSA 9, a $149 delta. Based on the most recent PSA 10 sale of $74.09 on Mar 31, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.

PSA 10

$161.55

Last sale $74.09 on Mar 31, 2026 UTC

PSA 9

$12.99

Last sale $12.99 on Aug 19, 2025 UTC

PSA 8

$7.50

Last sale $7.50 on Mar 8, 2026 UTC

The Spread

The PSA 9 to PSA 10 spread on Mr. Mime #122 SV: Scarlet & Violet 151.

$149

Dollar gap, PSA 9 to PSA 10

12.4x

PSA 10 sells for 12.4x a PSA 9

Three-Outcome EV Calculator

PSA 9 acquisition cost ($)

PSA resub cost ($)

Probability of each outcome (must total 100%)

PSA 10 (upgrade) 15%

PSA 9 (regrade) 70%

PSA 8 (downgrade) 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

Math favors holding the 9

SV: Scarlet & Violet 151 #122 Mr. Mime released in 2023 sits in the vintage WOTC tier where gem-mint premiums above $149 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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