Black Kyurem #BW58 from BW Black Star Promos is a holo promo card that currently sells for about $10.96 ungraded, with graded copies ranging from $30.00 at grade 9 to $198 at grade 10. A grade 10 copy sells for around $198, about 18× the $10.96 raw price, so high-grade copies are worth grading.