Should you grade Shelgon #20?

Borderline

+$9.11

net at PSA 10, but the gem rate is 40.9% — profitable only if it gems

The ledger

Raw card$1.77
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$16.63
PSA 10 sale$122.50
Net at PSA 10+$9.11
Net if it grades PSA 9 instead$-78.57

40.9% of the 44 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.