Dusk Mane Necrozma-GX #SM102 from SM Black Star Promos is a reverse holo promo card that currently sells for about $5.00 ungraded, with graded copies ranging from $5.51 at grade 7 to $49.99 at grade 10. A grade 10 copy sells for around $49.99, about 10× the $5.00 raw price, so high-grade copies are worth grading.