Lucario ex #17 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $5.88 ungraded, with graded copies ranging from $19.00 at grade 9 to $60.00 at grade 10. A grade 10 copy sells for around $60.00, about 10× the $5.88 raw price, so high-grade copies are worth grading.