SWSH12: Silver Tempest Serperior VSTAR #210: PSA 9 vs PSA 10

The PSA 10 to PSA 9 spread on SWSH12: Silver Tempest Serperior VSTAR #210 is a wide gem-mint premium: $31, with PSA 10 copies trading at 3x a PSA 9. Based on a recent PSA 10 sale of $49.99 on May 19, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.

PSA 10

$47.11

Last sale $49.99 on May 19, 2026 UTC

PSA 9

$15.66

Last sale $13.00 on Apr 24, 2026 UTC

PSA 8

$12.01

Last sale $19.49 on Apr 17, 2025 UTC

The Spread

The PSA 9 to PSA 10 spread on Serperior VSTAR #210 SWSH12: Silver Tempest.

$31

Dollar gap, PSA 9 to PSA 10

PSA 10 sells for 3x 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

SWSH12: Silver Tempest #210 Serperior VSTAR released in 2022 sits in the vintage WOTC tier where gem-mint premiums above $31 are common. PSA 10 populations shrink faster than supply on cards of this era, which is why the upgrade arbitrage stays alive.

More Serperior Comparisons

Other SWSH12: Silver Tempest Heavy Hitters

Track every grade tier. Spot every gap.

Real PSA prices across every grade tier. Founding member rate $3.99/mo locked forever. First 100 only.

Claim founding member rate

First 100 only. Founding member rate $3.99/mo locked forever.