Mew #9 from Wizards Black Star Promos is a holo promo card that currently sells for about $55.96 ungraded, with graded copies ranging from $59.00 at grade 7 to $1,996 at grade 10. A grade 10 copy sells for around $1,996, about 36× the $55.96 raw price, so high-grade copies are worth grading.