Xerneas #XY05 from XY Black Star Promos is a reverse holo promo card that currently sells for about $7.99 ungraded, with graded copies ranging from $18.55 at grade 9 to $89.06 at grade 10. A grade 10 copy sells for around $89.06, about 11× the $7.99 raw price, so high-grade copies are worth grading.