SWSH07: Evolving Skies Umbreon V #188: PSA 9 vs PSA 10
On SWSH07: Evolving Skies Umbreon V #188, the PSA 10 premium is a wide gem-mint premium: PSA 10 sells for 4.7x a PSA 9, a $239 delta. Based on a recent PSA 10 sale of $331.00 on May 25, 2026, the crack-and-resub math favors the resub: expected value is positive even at a conservative 15% upgrade probability.
PSA 10
$304.21
Last sale $331.00 on
PSA 9
$64.72
Last sale $65.00 on
PSA 8
$38.98
Last sale $44.95 on
The Spread
The PSA 9 to PSA 10 spread on Umbreon V #188 SWSH07: Evolving Skies.
$239
Dollar gap, PSA 9 to PSA 10
4.7x
PSA 10 sells for 4.7x 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
SWSH07: Evolving Skies #188 Umbreon V released in 2021 sits in the vintage WOTC tier where gem-mint premiums above $239 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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