Should You Grade Cool Porygon #15 from Wizards Black Star Promos?
Free PSA grading EV calculator pre-loaded with live market data for Cool Porygon #15. Current PSA 10 gem rate is 4.0% based on 4,232 graded copies. PSA 10 sales average $4999.50 vs a raw market of $92.25. Expected value of grading: $-2.67 (-1% ROI). Verdict: Sell raw.
Wizards Black Star Promos · #15 · Promo
Default-tier verdict
Sell raw$-3 (-1% ROI)
Based on raw market $92.25, PSA 10 $4999.50, gem rate 4.0% (4,232 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Cool Porygon #15 to PSA for grading. EV factors in real PSA population data (gem rates), live market prices for raw and graded copies, and PSA's tiered fee structure including upcharges when a card's graded value exceeds the tier's Max Insured Value. Adjust the inputs to match your card's exact condition for a personalized recommendation.
PSA population summary
| Grade | Population | Rate |
|---|---|---|
| PSA 10 | 169 | 4.0% |
| PSA 9 | 1,428 | 33.7% |
| PSA 8 | 1,435 | 33.9% |
| PSA 7 | 438 | 10.3% |
