Zekrom #XY76 from XY Black Star Promos is a reverse holo promo card that currently sells for about $66.50 ungraded, with graded copies ranging from $103 at grade 7 to $1,764 at grade 10. A grade 10 copy sells for around $1,764, about 27× the $66.50 raw price, so high-grade copies are worth grading.