Dialga ex #180 from Scarlet & Violet Promos is a reverse holo promo card that currently sells for about $1.53 ungraded, with graded copies ranging from $9.00 at grade 9 to $36.80 at grade 10. A grade 10 copy sells for around $36.80, about 24× the $1.53 raw price, so high-grade copies are worth grading.