Druddigon #BW80 from BW Black Star Promos is a reverse holo promo card that currently sells for about $5.62 ungraded, with graded copies ranging from $50.00 at grade 9 to $94.33 at grade 10. A grade 10 copy sells for around $94.33, about 17× the $5.62 raw price, so high-grade copies are worth grading.