Magneton #153 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $5.18 ungraded, with graded copies ranging from $5.50 at grade 7 to $101 at grade 10. A grade 10 copy sells for around $101, about 20× the $5.18 raw price, so high-grade copies are worth grading.