Kangaskhan ex #55 from Scarlet & Violet Black Star Promos is a reverse holo promo card that currently sells for about $7.81 ungraded, with graded copies ranging from $14.78 at grade 9 to $10.50 at grade 10. A grade 10 copy sells for around $10.50 vs $7.81 raw. That's a modest premium, so grading only pays off for near-perfect copies.