Should you grade Mew #4?

Borderline

+$363.14

net at PSA 10, but the gem rate is 1.3% — profitable only if it gems

The ledger

Raw card$101.35
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$85.92
PSA 10 sale$645.40
Net at PSA 10+$363.14
Net if it grades PSA 9 instead+$63.51

1.3% of the 599 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.