SV08: Surging Sparks Gravity Mountain 250/191: PSA 9 vs PSA 10
SV08: Surging Sparks Gravity Mountain 250/191 shows a wide gem-mint premium between PSA 9 and PSA 10: a $51 dollar gap, with the gem mint multiplier at 4.1x. Based on the last tracked PSA 10 sale of $70.00 on Apr 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
$67.25
Last sale $70.00 on
PSA 9
$16.28
Last sale $21.99 on
PSA 8
$16.70
Last sale $20.00 on
The Spread
The PSA 9 to PSA 10 spread on Gravity Mountain 250/191 (SV08: Surging Sparks).
$51
Dollar gap, PSA 9 to PSA 10
4.1x
PSA 10 sells for 4.1x 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
SV08: Surging Sparks 250/191 Gravity Mountain is a modern-era release from 2024. The gap between its PSA 9 and PSA 10 prices is $51.
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