Should you grade Blastoise #137?

Borderline

+$10271.19

net at PSA 10, but the gem rate is 3.4% — profitable only if it gems

The ledger

Raw card$303.67
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$1630.15
PSA 10 sale$12300.00
Net at PSA 10+$10271.19
Net if it grades PSA 9 instead+$693.84

3.4% of the 1,349 copies PSA has graded came back a 10. Pop gem rates are a ceiling — centering and surface on your copy decide.

Prices from real completed sales, updated daily. Population data from PSA's public population report.