Darkrai-EX #BW46 from BW Black Star Promos is a holo promo card that currently sells for about $6.87 ungraded, with graded copies ranging from $19.50 at grade 7 to $115 at grade 10. A grade 10 copy sells for around $115, about 17× the $6.87 raw price, so high-grade copies are worth grading.