M Mewtwo-EX #63 from BREAKthrough is a holo holo_rare card that currently sells for about $27.63 ungraded, with graded copies ranging from $32.50 at grade 7 to $902 at grade 10. A grade 10 copy sells for around $902, about 33× the $27.63 raw price, so high-grade copies are worth grading.