Lucario & Melmetal-GX #SM192 from SM Black Star Promos is a reverse holo promo card that currently sells for about $53.00 ungraded, with graded copies ranging from $45.00 at grade 7 to $350 at grade 10. TCGrader's AI has graded 3 copies of Lucario & Melmetal-GX (SM Black Star Promos), averaging 7.6 overall. A grade 10 copy sells for around $350, about 6.6× the $53.00 raw price, so high-grade copies are worth grading.