M Mewtwo-EX #63 from BREAKthrough is a holo holo_rare card that currently sells for about $27.87 ungraded, with graded copies ranging from $38.43 at grade 7 to $600 at grade 10. A grade 10 copy sells for around $600, about 22× the $27.87 raw price, so high-grade copies are worth grading.