Base Set Growlithe 28/102: PSA 9 vs PSA 10
Base Set Growlithe 28/102 shows a wide gem-mint premium between PSA 9 and PSA 10: an $85 dollar gap, with the gem mint multiplier at 3.1x. Based on the last tracked PSA 10 sale of $138.00 on Apr 27, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$126.50
Last sale $138.00 on
PSA 9
$41.42
Last sale $40.00 on
PSA 8
$24.75
Last sale $31.00 on
The Spread
The PSA 9 to PSA 10 spread on Growlithe 28/102 (Base Set).
$85
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 28/102 Growlithe is a WOTC-era release from 1999. The gap between its PSA 9 and PSA 10 prices is $85.
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