Yveltal-EX #XY150a from XY Black Star Promos is a reverse holo promo card that currently sells for about $162 ungraded, with graded copies ranging from $155 at grade 7 to $3,100 at grade 10. A grade 10 copy sells for around $3,100, about 19× the $162 raw price, so high-grade copies are worth grading.