Base Set 2 Vulpix #99: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on Base Set 2 Vulpix #99 is one of the widest gaps in vintage WOTC: $129, with PSA 10 copies trading at 6.4x a PSA 9. Based on the most recent PSA 10 sale of $152.50 on Apr 6, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$152.50
Last sale $152.50 on
PSA 9
$24.00
Last sale $28.00 on
PSA 8
$15.40
Last sale $15.40 on
The Spread
The PSA 9 to PSA 10 spread on Vulpix #99 Base Set 2.
$129
Dollar gap, PSA 9 to PSA 10
6.4x
PSA 10 sells for 6.4x 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 Base Set 2 picture: a non-holo with a $129 gap between PSA 9 and PSA 10. The PSA 9 to PSA 10 jump on WOTC-era cards reflects population scarcity at the top grade, not raw print run.
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