Latios-EX #XY72 from XY Black Star Promos is a reverse holo promo card that currently sells for about $5.11 ungraded, with graded copies ranging from $10.25 at grade 7 to $450 at grade 10. A grade 10 copy sells for around $450, about 88× the $5.11 raw price, so high-grade copies are worth grading.