Dialga LV.X #DP17 from DP Black Star Promos is a reverse holo promo card that currently sells for about $20.00 ungraded, with graded copies ranging from $75.00 at grade 7 to $12,151 at grade 10. A grade 10 copy sells for around $12,151, about 608× the $20.00 raw price, so high-grade copies are worth grading.