Greninja ex #54 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $4.92 ungraded, with graded copies ranging from $16.00 at grade 9 to $68.99 at grade 10. A grade 10 copy sells for around $68.99, about 14× the $4.92 raw price, so high-grade copies are worth grading.