Froslass #117 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $4.99 ungraded, with graded copies ranging from $8.50 at grade 9 to $275 at grade 10. A grade 10 copy sells for around $275, about 55× the $4.99 raw price, so high-grade copies are worth grading.