Base Set 2 Mr. Mime 27/130: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on Base Set 2 Mr. Mime 27/130 is a meaningful PSA 10 premium: $21, with PSA 10 copies trading at 2.1x a PSA 9. Based on the last tracked PSA 10 sale of $28.00 on Mar 30, 2025, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$39.85
Last sale $28.00 on
PSA 9
$19.25
Last sale $19.25 on
PSA 8
$16.99
Last sale $16.99 on
The Spread
The PSA 9 to PSA 10 spread on Mr. Mime 27/130 (Base Set 2).
$21
Dollar gap, PSA 9 to PSA 10
2.1x
PSA 10 sells for 2.1x 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
Where this card lands in the broader Base Set 2 picture: a WOTC-era card carrying a $21 gap between PSA 9 and PSA 10, a 2.1x multiple on the PSA 9 price.
More Mr. Mime Comparisons
Other Base Set 2 Heavy Hitters
Track every grade tier. Spot every gap.
Real PSA prices across every grade tier. Free during beta.
Get Free Beta AccessFounding Member Cohort · Limited to the First 100 Members.