Celebi #XY93 from XY Black Star Promos is a reverse holo promo card that currently sells for about $6.33 ungraded, with graded copies ranging from $13.63 at grade 7 to $86.29 at grade 10. A grade 10 copy sells for around $86.29, about 14× the $6.33 raw price, so high-grade copies are worth grading.