Torchic #6 from Nintendo Black Star Promos is a reverse holo promo card that currently sells for about $2,413 ungraded, with graded copies ranging from $3,710 at grade 7 to $520 at grade 10. A grade 10 copy sells for around $520 vs $2,413 raw. That's a modest premium, so grading only pays off for near-perfect copies.