Karen #XY177a from XY Black Star Promos is a reverse holo promo card that currently sells for about $60.16 ungraded, with graded copies ranging from $57.85 at grade 7 to $1,850 at grade 10. A grade 10 copy sells for around $1,850, about 31× the $60.16 raw price, so high-grade copies are worth grading.