Volcanion #SM179 from SM Black Star Promos is a reverse holo promo card that currently sells for about $7.17 ungraded, with graded copies ranging from $33.84 at grade 9 to $28.99 at grade 10. A grade 10 copy sells for around $28.99, about 4× the $7.17 raw price, so high-grade copies are worth grading.