Fossil Aerodactyl #16: PSA 9 vs PSA 10
Fossil Aerodactyl #16 shows a wide gem-mint premium between PSA 9 and PSA 10: a $125 dollar gap, with the gem mint multiplier at 4.5x. Based on the most recent PSA 10 sale of $160.00 on Mar 13, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$160.00
Last sale $160.00 on
PSA 9
$35.50
Last sale $35.50 on
PSA 8
$24.58
Last sale $24.58 on
The Spread
The PSA 9 to PSA 10 spread on Aerodactyl #16 Fossil.
$125
Dollar gap, PSA 9 to PSA 10
4.5x
PSA 10 sells for 4.5x 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
Fossil #16 Aerodactyl released in 1999 sits in the vintage WOTC tier where gem-mint premiums above $125 are common. PSA 10 populations shrink faster than supply on cards of this era, which is why the upgrade arbitrage stays alive.
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