Celebi #XY111 from XY Black Star Promos is a reverse holo promo card that currently sells for about $28.85 ungraded, with graded copies ranging from $25.00 at grade 7 to $1,792 at grade 10. A grade 10 copy sells for around $1,792, about 62× the $28.85 raw price, so high-grade copies are worth grading.