SV: Prismatic Evolutions Scream Tail 42/131: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on SV: Prismatic Evolutions Scream Tail 42/131 is a wide gem-mint premium: $35, with PSA 10 copies trading at 3.3x a PSA 9. Based on the last tracked PSA 10 sale of $50.00 on Mar 16, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$50.00
Last sale $50.00 on
PSA 9
$15.26
Last sale $15.51 on
PSA 8
—
Limited recent sales tracked. Pull eBay sold comps before acting.
The Spread
The PSA 9 to PSA 10 spread on Scream Tail 42/131 (SV: Prismatic Evolutions).
$35
Dollar gap, PSA 9 to PSA 10
3.3x
PSA 10 sells for 3.3x 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 42/131 Scream Tail is a modern-era release from 2025. The gap between its PSA 9 and PSA 10 prices is $35.
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