Arceus & Dialga & Palkia-GX #221 from Cosmic Eclipse is a rare card that currently sells for about $383 ungraded, with graded copies ranging from $196 at grade 7 to $1,650 at grade 10. TCGrader's AI has graded 21 copies of Arceus & Dialga & Palkia-GX (Cosmic Eclipse), averaging 7.8 overall. Only 5% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $1,650, about 4.3× the $383 raw price, so high-grade copies are worth grading.