SWSH: Crown Zenith Sky Seal Stone 143/159: PSA 9 vs PSA 10
On SWSH: Crown Zenith Sky Seal Stone 143/159, PSA 10 sells for 2.4x a PSA 9, a $17 delta, which is a meaningful PSA 10 premium. Based on the last tracked PSA 10 sale of $29.99 on Apr 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
$29.99
Last sale $29.99 on
PSA 9
$12.50
Last sale $12.50 on
PSA 8
—
Limited recent sales tracked. Pull eBay sold comps before acting.
The Spread
The PSA 9 to PSA 10 spread on Sky Seal Stone 143/159 (SWSH: Crown Zenith).
$17
Dollar gap, PSA 9 to PSA 10
2.4x
PSA 10 sells for 2.4x 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
Where this card lands in the broader SWSH: Crown Zenith picture: a modern-era holo carrying a $17 gap between PSA 9 and PSA 10, a 2.4x multiple on the PSA 9 price.
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