Revavroom #8 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $3.59 ungraded, with graded copies ranging from $8.00 at grade 7 to $120 at grade 10. A grade 10 copy sells for around $120, about 33× the $3.59 raw price, so high-grade copies are worth grading.