Quagsire #156 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $1.01 ungraded, with graded copies ranging from $23.56 at grade 9 to $170 at grade 10. A grade 10 copy sells for around $170, about 168× the $1.01 raw price, so high-grade copies are worth grading.