Regigigas #XY82 from XY Black Star Promos is a reverse holo promo card that currently sells for about $15.99 ungraded, with graded copies ranging from $20.00 at grade 7 to $4,868 at grade 10. A grade 10 copy sells for around $4,868, about 304× the $15.99 raw price, so high-grade copies are worth grading.