Koraidon #14 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $7.99 ungraded, with graded copies ranging from $11.84 at grade 7 to $180 at grade 10. A grade 10 copy sells for around $180, about 23× the $7.99 raw price, so high-grade copies are worth grading.