Iono's Kilowattrel #182 from Scarlet & Violet Promos is a reverse holo promo card that currently sells for about $3.77 ungraded, with graded copies ranging from $14.80 at grade 9 to $45.80 at grade 10. A grade 10 copy sells for around $45.80, about 12× the $3.77 raw price, so high-grade copies are worth grading.