Regirock #SM74 from SM Black Star Promos is a reverse holo promo card that currently sells for about $5.64 ungraded, with graded copies ranging from $73.57 at grade 9 to $88.00 at grade 10. A grade 10 copy sells for around $88.00, about 16× the $5.64 raw price, so high-grade copies are worth grading.