Should You Grade Mewtwo #12 from Wizards Black Star Promos?
Free PSA grading EV calculator pre-loaded with live market data for Mewtwo #12. Current PSA 10 gem rate is 14.1% based on 2,045 graded copies. PSA 10 sales average $3655.47 vs a raw market of $106.15. Expected value of grading: $305.55 (66% ROI). Verdict: Grade It.
Wizards Black Star Promos · #12 · Promo
Default-tier verdict
Grade It+$306 (+66% ROI)
Based on raw market $106.15, PSA 10 $3655.47, gem rate 14.1% (2,045 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Mewtwo #12 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 | 289 | 14.1% |
| PSA 9 | 435 | 21.3% |
| PSA 8 | 477 | 23.3% |
| PSA 7 | 304 | 14.9% |
