Should You Grade Mewtwo & Mew-GX #SM191 from SM Black Star Promos?
Free PSA grading EV calculator pre-loaded with live market data for Mewtwo & Mew-GX #SM191. Current PSA 10 gem rate is 49.6% based on 20,172 graded copies. PSA 10 sales average $1700.04 vs a raw market of $255.90. Expected value of grading: $601.62 (129% ROI). Verdict: Grade It.
SM Black Star Promos · #SM191 · Promo
Default-tier verdict
Grade It+$602 (+129% ROI)
Based on raw market $255.90, PSA 10 $1700.04, gem rate 49.6% (20,172 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Mewtwo & Mew-GX #SM191 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 | 10,012 | 49.6% |
| PSA 9 | 7,150 | 35.4% |
| PSA 8 | 1,699 | 8.4% |
| PSA 7 | 472 | 2.3% |
