Origin Forme Dialga VSTAR #SWSH256 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $4.05 ungraded, with graded copies ranging from $17.50 at grade 9 to $22.50 at grade 10. A grade 10 copy sells for around $22.50, about 5.6× the $4.05 raw price, so high-grade copies are worth grading.