Arceus #XY83 from XY Black Star Promos is a reverse holo promo card that currently sells for about $34.79 ungraded, with graded copies ranging from $36.47 at grade 7 to $2,076 at grade 10. A grade 10 copy sells for around $2,076, about 60× the $34.79 raw price, so high-grade copies are worth grading.