Mewtwo-EX #61 from BREAKthrough is a holo holo_rare card that currently sells for about $6.49 ungraded, with graded copies ranging from $11.30 at grade 7 to $485 at grade 10. A grade 10 copy sells for around $485, about 75× the $6.49 raw price, so high-grade copies are worth grading.