Mew #XY110 from XY Black Star Promos is a reverse holo promo card that currently sells for about $93.00 ungraded, with graded copies ranging from $116 at grade 7 to $4,750 at grade 10. A grade 10 copy sells for around $4,750, about 51× the $93.00 raw price, so high-grade copies are worth grading.