Should You Grade Mewtwo #SM77 from SM Black Star Promos?
Free PSA grading EV calculator pre-loaded with live market data for Mewtwo #SM77. Current PSA 10 gem rate is 4.1% based on 944 graded copies. PSA 10 sales average $5432.27 vs a raw market of $19.99. Expected value of grading: $-248.43 (-39% ROI). Verdict: Sell raw.
SM Black Star Promos · #SM77 · Promo
Default-tier verdict
Sell raw$-248 (-39% ROI)
Based on raw market $19.99, PSA 10 $5432.27, gem rate 4.1% (944 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Mewtwo #SM77 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 | 39 | 4.1% |
| PSA 9 | 248 | 26.3% |
| PSA 8 | 311 | 32.9% |
| PSA 7 | 135 | 14.3% |
