Luxray #SWSH023 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $14.70 ungraded, with graded copies ranging from $17.49 at grade 9 to $23.40 at grade 10. A grade 10 copy sells for around $23.40 vs $14.70 raw. That's a modest premium, so grading only pays off for near-perfect copies.