Pikachu ex #106 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $8.09 ungraded, with graded copies ranging from $23.50 at grade 9 to $190 at grade 10. A grade 10 copy sells for around $190, about 24× the $8.09 raw price, so high-grade copies are worth grading.