Should you grade Arceus & Dialga & Palkia GX #221?

Borderline

+$3519.42

net at PSA 10, but the gem rate is 35.6% — profitable only if it gems

The ledger

Raw card$527.50
Regular fee−$79.99
Shipping, both ways−$15.00
Selling fees−$633.09
PSA 10 sale$4775.00
Net at PSA 10+$3519.42
Net if it grades PSA 9 instead+$32.83

35.6% of the 4,704 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.