Palkia LV.X #DP18 from DP Black Star Promos is a reverse holo promo card that currently sells for about $17.17 ungraded, with graded copies ranging from $38.35 at grade 7 to $376 at grade 10. A grade 10 copy sells for around $376, about 22× the $17.17 raw price, so high-grade copies are worth grading.