Crobat #BW51 from BW Black Star Promos is a reverse holo promo card that currently sells for about $22.00 ungraded, with graded copies ranging from $24.46 at grade 7 to $283 at grade 10. A grade 10 copy sells for around $283, about 13× the $22.00 raw price, so high-grade copies are worth grading.