SLABLYTICS Track Free During Beta

Base Set Dragonair 18/102: PSA 9 vs PSA 10

The PSA 10 to PSA 9 spread on Base Set Dragonair 18/102 is an unusually wide gem-mint premium: $243, with PSA 10 copies trading at 5x a PSA 9. Based on the last tracked PSA 10 sale of $350.00 on May 1, 2026, the crack-and-resub math favors the resub: expected value is positive even at a conservative 15% upgrade probability.

Base Set Dragonair 18/102
PSA 10
$303.00
Last sale $350.00 on
PSA 9
$60.25
Last sale $69.99 on
PSA 8
$59.99
Last sale $59.99 on

The Spread

The PSA 9 to PSA 10 spread on Dragonair 18/102 (Base Set).

$243
Dollar gap, PSA 9 to PSA 10
5x
PSA 10 sells for 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

Base Set 18/102 Dragonair is a WOTC-era release from 1999. The gap between its PSA 9 and PSA 10 prices is $243.

Track every grade tier. Spot every gap.

Real PSA prices across every grade tier. Free during beta.

Get Free Beta Access
Founding Member Cohort · Limited to the First 100 Members.