Should you grade Venusaur #20?

Borderline

+$13.88

net at PSA 10, but the gem rate is 5.5% — profitable only if it gems

The ledger

Raw card$5.06
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$17.86
PSA 10 sale$131.79
Net at PSA 10+$13.88
Net if it grades PSA 9 instead$-65.76

5.5% of the 505 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.