Lugia #XY156 from XY Black Star Promos is a reverse holo promo card that currently sells for about $10.68 ungraded, with graded copies ranging from $21.49 at grade 7 to $1,500 at grade 10. A grade 10 copy sells for around $1,500, about 140× the $10.68 raw price, so high-grade copies are worth grading.