Koraidon ex #247 from Scarlet & Violet is a reverse holo illustration_rare card that currently sells for about $15.47 ungraded, with graded copies ranging from $14.50 at grade 7 to $15.00 at grade 10. A grade 10 copy sells for around $15.00 vs $15.47 raw. That's a modest premium, so grading only pays off for near-perfect copies.