Should you grade Golduck #55?

Borderline

+$23.51

net at PSA 10, but the gem rate is 33.3% — profitable only if it gems

The ledger

Raw card$8.50
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$19.86
PSA 10 sale$146.86
Net at PSA 10+$23.51
Net if it grades PSA 9 instead$-69.62

33.3% of the 21 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.