Garchomp-EX #XY167 from XY Black Star Promos is a reverse holo promo card that currently sells for about $10.38 ungraded, with graded copies ranging from $15.00 at grade 7 to $500 at grade 10. A grade 10 copy sells for around $500, about 48× the $10.38 raw price, so high-grade copies are worth grading.