Raging Bolt ex #145 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $1.66 ungraded, with graded copies ranging from $10.50 at grade 9 to $29.99 at grade 10. A grade 10 copy sells for around $29.99, about 18× the $1.66 raw price, so high-grade copies are worth grading.