Houndoom ex #103 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $2.84 ungraded, with graded copies ranging from $14.02 at grade 9 to $15.00 at grade 9.5. A grade 9.5 copy sells for around $15.00, about 5.3× the $2.84 raw price, so high-grade copies are worth grading.