Black Kyurem #100 from Boundaries Crossed is a holo rare card that currently sells for about $2.75 ungraded, with graded copies ranging from $24.44 at grade 7 to $27.31 at grade 10. A grade 10 copy sells for around $27.31, about 9.9× the $2.75 raw price, so high-grade copies are worth grading.