SV: Scarlet & Violet 151 Omanyte #138: PSA 9 vs PSA 10

The PSA 10 to PSA 9 spread on SV: Scarlet & Violet 151 Omanyte #138 is one of the widest gaps in vintage WOTC: $293, with PSA 10 copies trading at 24.6x a PSA 9. Based on the most recent PSA 10 sale of $305.00 on Mar 15, 2026, the crack-and-resub math favors the resub: expected value is positive even at a conservative 15% upgrade probability.

PSA 10

$305.00

Last sale $305.00 on Mar 15, 2026 UTC

PSA 9

$12.40

Last sale $12.40 on Apr 13, 2026 UTC

PSA 8

—

Limited recent sales tracked. Pull eBay sold comps before acting.

The Spread

The PSA 9 to PSA 10 spread on Omanyte #138 SV: Scarlet & Violet 151.

$293

Dollar gap, PSA 9 to PSA 10

24.6x

PSA 10 sells for 24.6x 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 #138 Omanyte released in 2023 sits in the vintage WOTC tier where gem-mint premiums above $293 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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