Dragonite-GX #SM156 from SM Black Star Promos is a reverse holo promo card that currently sells for about $79.57 ungraded, with graded copies ranging from $36.50 at grade 7 to $550 at grade 10. A grade 10 copy sells for around $550, about 6.9× the $79.57 raw price, so high-grade copies are worth grading.