SWSH07: Evolving Skies Trevenant VMAX #14: PSA 9 vs PSA 10

On SWSH07: Evolving Skies Trevenant VMAX #14, the PSA 10 premium is one of the widest gaps in vintage WOTC: PSA 10 sells for 6.6x a PSA 9, a $44 delta. Based on a recent PSA 10 sale of $41.99 on May 12, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.

SWSH07: Evolving Skies Trevenant VMAX #14 Holo

PSA 10

$52.50

Last sale $41.99 on May 12, 2026 UTC

PSA 9

$8.00

Last sale $8.00 on Mar 18, 2026 UTC

PSA 8

$12.50

Last sale $12.50 on Mar 31, 2026 UTC

The Spread

The PSA 9 to PSA 10 spread on Trevenant VMAX #14 SWSH07: Evolving Skies.

$44

Dollar gap, PSA 9 to PSA 10

6.6x

PSA 10 sells for 6.6x 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

SWSH07: Evolving Skies #14 Trevenant VMAX Holo released in 2021 sits in the vintage WOTC tier where gem-mint premiums above $44 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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