Lunala-GX #SM17 from SM Black Star Promos is a reverse holo promo card that currently sells for about $4.36 ungraded, with graded copies ranging from $12.11 at grade 7 to $125 at grade 10. A grade 10 copy sells for around $125, about 29× the $4.36 raw price, so high-grade copies are worth grading.