Jolteon-GX #SM173 from SM Black Star Promos is a reverse holo promo card that currently sells for about $7.59 ungraded, with graded copies ranging from $13.94 at grade 7 to $106 at grade 10. A grade 10 copy sells for around $106, about 14× the $7.59 raw price, so high-grade copies are worth grading.