Base Set Machop 52/102: PSA 9 vs PSA 10
Base Set Machop 52/102 shows a wide gem-mint premium between PSA 9 and PSA 10: a $70 dollar gap, with the gem mint multiplier at 3.1x. Based on the most recent PSA 10 sale of $92.50 on May 18, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$103.35
Last sale $92.50 on
PSA 9
$33.51
Last sale $40.00 on
PSA 8
$17.99
Last sale $24.99 on
The Spread
The PSA 9 to PSA 10 spread on Machop 52/102 (Base Set).
$70
Dollar gap, PSA 9 to PSA 10
3.1x
PSA 10 sells for 3.1x 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
Base Set 52/102 Machop is a WOTC-era release from 1999. The gap between its PSA 9 and PSA 10 prices is $70.
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