Should You Grade Blastoise #4 from Expedition Base Set?
Free PSA grading EV calculator pre-loaded with live market data for Blastoise #4. Current PSA 10 gem rate is 5.1% based on 1,734 graded copies. PSA 10 sales average $14089.19 vs a raw market of $279.60. Expected value of grading: $1491.43 (164% ROI). Verdict: Grade It.
Expedition Base Set · #4 · Rare Holo
Default-tier verdict
Grade It+$1491 (+164% ROI)
Based on raw market $279.60, PSA 10 $14089.19, gem rate 5.1% (1,734 graded). Adjust inputs below for your card's exact condition.
About this calculator
This page computes the expected value (EV) of submitting Blastoise #4 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 | 89 | 5.1% |
| PSA 9 | 364 | 21.0% |
| PSA 8 | 397 | 22.9% |
| PSA 7 | 287 | 16.6% |
