Iron Thorns #98 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $3.50 ungraded, with graded copies ranging from $7.12 at grade 7 to $99.99 at grade 10. A grade 10 copy sells for around $99.99, about 29× the $3.50 raw price, so high-grade copies are worth grading.