Base Set Magnemite 53/102: PSA 9 vs PSA 10
On Base Set Magnemite 53/102, PSA 10 sells for 2.8x a PSA 9, a $51 delta, which is a meaningful PSA 10 premium. Based on the last tracked PSA 10 sale of $72.02 on May 10, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$78.51
Last sale $72.02 on
PSA 9
$27.99
Last sale $25.00 on
PSA 8
$25.00
Last sale $25.00 on
The Spread
The PSA 9 to PSA 10 spread on Magnemite 53/102 (Base Set).
$51
Dollar gap, PSA 9 to PSA 10
2.8x
PSA 10 sells for 2.8x 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 picture: a WOTC-era card carrying a $51 gap between PSA 9 and PSA 10, a 2.8x multiple on the PSA 9 price.
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