SV01: Scarlet & Violet Base Set Katy 237/198: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on SV01: Scarlet & Violet Base Set Katy 237/198 is a wide gem-mint premium: $30, with PSA 10 copies trading at 3.1x a PSA 9. Based on the last tracked PSA 10 sale of $38.50 on Apr 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
$43.65
Last sale $38.50 on
PSA 9
$14.00
Last sale $12.00 on
PSA 8
$17.50
Last sale $17.50 on
The Spread
The PSA 9 to PSA 10 spread on Katy 237/198 (SV01: Scarlet & Violet Base Set).
$30
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
Where this card lands in the broader SV01: Scarlet & Violet Base Set picture: a modern-era card carrying a $30 gap between PSA 9 and PSA 10, a 3.1x multiple on the PSA 9 price.
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