Decidueye-GX #SM37 from SM Black Star Promos is a reverse holo promo card that currently sells for about $5.14 ungraded, with graded copies ranging from $9.25 at grade 7 to $150 at grade 10. A grade 10 copy sells for around $150, about 29× the $5.14 raw price, so high-grade copies are worth grading.