Yveltal #XY06 from XY Black Star Promos is a reverse holo promo card that currently sells for about $6.01 ungraded, with graded copies ranging from $38.33 at grade 9 to $87.60 at grade 10. A grade 10 copy sells for around $87.60, about 15× the $6.01 raw price, so high-grade copies are worth grading.