Should You Grade Marnie #SWSH121 from SWSH Black Star Promos?
Free PSA grading EV calculator pre-loaded with live market data for Marnie #SWSH121. Current PSA 10 gem rate is 29.3% based on 3,391 graded copies. PSA 10 sales average $160.00 vs a raw market of $28.82. Expected value of grading: $-31.90 (-32% ROI). Verdict: Sell raw.
SWSH Black Star Promos · #SWSH121 · Promo
Default-tier verdict
Sell raw$-32 (-32% ROI)
Based on raw market $28.82, PSA 10 $160.00, gem rate 29.3% (3,391 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Marnie #SWSH121 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 | 993 | 29.3% |
| PSA 9 | 1,909 | 56.3% |
| PSA 8 | 428 | 12.6% |
| PSA 7 | 40 | 1.2% |
