Yanmega #187 from Scarlet & Violet Promos is a reverse holo promo card that currently sells for about $2.34 ungraded, with graded copies ranging from $1.54 at grade 9 to $2.00 at grade 9.5. A grade 9.5 copy sells for around $2.00 vs $2.34 raw. That's a modest premium, so grading only pays off for near-perfect copies.