Mawile #39 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $5.57 ungraded, with graded copies ranging from $44.00 at grade 9 to $99.00 at grade 10. A grade 10 copy sells for around $99.00, about 18× the $5.57 raw price, so high-grade copies are worth grading.