SV04: Paradox Rift Porygon-Z 144/182: PSA 9 vs PSA 10
The PSA 10 to PSA 9 spread on SV04: Paradox Rift Porygon-Z 144/182 is a wide gem-mint premium: $30, with PSA 10 copies trading at 4.1x a PSA 9. Based on the last tracked PSA 10 sale of $35.00 on Feb 24, 2025, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$39.95
Last sale $35.00 on
PSA 9
$9.69
Last sale $9.69 on
PSA 8
—
Limited recent sales tracked. Pull eBay sold comps before acting.
The Spread
The PSA 9 to PSA 10 spread on Porygon-Z 144/182 (SV04: Paradox Rift).
$30
Dollar gap, PSA 9 to PSA 10
4.1x
PSA 10 sells for 4.1x 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
SV04: Paradox Rift 144/182 Porygon-Z is a modern-era release from 2023. The gap between its PSA 9 and PSA 10 prices is $30.
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