SV: Prismatic Evolutions Iron Crown ex 158/131: PSA 9 vs PSA 10
On SV: Prismatic Evolutions Iron Crown ex 158/131, PSA 10 sells for 3.7x a PSA 9, a $93 delta, which is a wide gem-mint premium. Based on the most recent PSA 10 sale of $150.00 on May 28, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$128.11
Last sale $150.00 on
PSA 9
$35.04
Last sale $34.95 on
PSA 8
$16.45
Last sale $18.50 on
The Spread
The PSA 9 to PSA 10 spread on Iron Crown ex 158/131 (SV: Prismatic Evolutions).
$93
Dollar gap, PSA 9 to PSA 10
3.7x
PSA 10 sells for 3.7x 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
SV: Prismatic Evolutions 158/131 Iron Crown ex is a modern-era release from 2025. The gap between its PSA 9 and PSA 10 prices is $93.
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