Darkrai #BW73 from BW Black Star Promos is a holo promo card that currently sells for about $82.51 ungraded, with graded copies ranging from $200 at grade 7 to $8,700 at grade 10. A grade 10 copy sells for around $8,700, about 105× the $82.51 raw price, so high-grade copies are worth grading.