Compare John Costello values across different grades. See whether grading is worth it based on current prices and PSA gem rates.
Price by Grade
| Grade | Guardian Estimate | Premium vs Raw |
|---|
| Raw / Ungraded | $0.99 | — |
| PSA 8 | $5.50 | +456% |
| PSA 10 Gem Mint | $25.00 | +2425% |
Frequently Asked Questions
Is John Costello worth grading? A PSA 10 John Costello is worth $25.00 vs $0.99 raw — a 2425% premium.
What is John Costello PSA 10 worth? $25.00 as of October 2026.