Carvanha #93 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $2.04 ungraded, with graded copies ranging from $24.51 at grade 9 to $75.00 at grade 10. A grade 10 copy sells for around $75.00, about 37× the $2.04 raw price, so high-grade copies are worth grading.