Zekrom #BW24 from BW Black Star Promos is a reverse holo promo card that currently sells for about $7.42 ungraded, with graded copies ranging from $12.12 at grade 7 to $164 at grade 10. A grade 10 copy sells for around $164, about 22× the $7.42 raw price, so high-grade copies are worth grading.