Groudon ex #38 from Nintendo Black Star Promos is a holo promo card that currently sells for about $40.00 ungraded, with graded copies ranging from $57.00 at grade 7 to $5,900 at grade 10. A grade 10 copy sells for around $5,900, about 148× the $40.00 raw price, so high-grade copies are worth grading.