Arceus & Dialga & Palkia-GX #221 from Cosmic Eclipse is a holo rare card that currently sells for about $526 ungraded, with graded copies ranging from $384 at grade 7 to $3,855 at grade 10. A grade 10 copy sells for around $3,855, about 7.3× the $526 raw price, so high-grade copies are worth grading.