Reshiram-GX #SM137 from SM Black Star Promos is a reverse holo promo card that currently sells for about $6.87 ungraded, with graded copies ranging from $14.92 at grade 9 to $142 at grade 10. A grade 10 copy sells for around $142, about 21× the $6.87 raw price, so high-grade copies are worth grading.