Thwackey #115 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $3.03 ungraded, with graded copies ranging from $66.00 at grade 7 to $110 at grade 10. A grade 10 copy sells for around $110, about 36× the $3.03 raw price, so high-grade copies are worth grading.