Base Set 2 Jigglypuff 77/130: PSA 9 vs PSA 10
On Base Set 2 Jigglypuff 77/130, PSA 10 sells for 5.5x a PSA 9, a $93 delta, which is an unusually wide gem-mint premium. Based on the last tracked PSA 10 sale of $127.50 on Apr 20, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$113.75
Last sale $127.50 on
PSA 9
$20.50
Last sale $20.50 on
PSA 8
$18.23
Last sale $18.23 on
The Spread
The PSA 9 to PSA 10 spread on Jigglypuff 77/130 (Base Set 2).
$93
Dollar gap, PSA 9 to PSA 10
5.5x
PSA 10 sells for 5.5x 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 WOTC-era card carrying a $93 gap between PSA 9 and PSA 10, a 5.5x multiple on the PSA 9 price.
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