Kyurem #BW44 from BW Black Star Promos is a reverse holo promo card that currently sells for about $4.61 ungraded, with graded copies ranging from $42.50 at grade 9 to $83.55 at grade 10. A grade 10 copy sells for around $83.55, about 18× the $4.61 raw price, so high-grade copies are worth grading.