Chi-Yu #57 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $3.35 ungraded, with graded copies ranging from $11.51 at grade 9 to $140 at grade 10. A grade 10 copy sells for around $140, about 42× the $3.35 raw price, so high-grade copies are worth grading.