How the number is worked out
- What a graded copy is likely worth = the card's own gem rate times the PSA 10 price, plus the rest at the PSA 9 price. The gem rate is the share of graded copies of that exact printing we have seen come back a 10.
- The fee follows PSA's published tiers, which rise with the card's value: $60 up to $1,000, $80 to $1,500, $199 to $2,500, $349 to $5,000, $599 to $10,000. Shipping and eBay's selling fee are not included.
- What grading adds = that likely graded value, minus the raw price you'd otherwise get, minus the fee. Anything that misses a 10 is counted as a 9, which is the honest middle case.
- Nothing is scored on fewer than 3 graded copies, and a card whose PSA 9 price sits far above its raw price is flagged rather than ranked — that usually means the sales aren't really the same printing.
- Prices come from live eBay listings, not PSA's official grading totals, so treat the gem rate as a good guide rather than a guarantee. Condition still decides: a soft corner drops a grade no model can see.