Mewtwo-EX #158 from BREAKthrough is a rare card that currently sells for about $42.68 ungraded, with graded copies ranging from $60.00 at grade 7 to $803 at grade 10. TCGrader's AI has graded 5 copies of Mewtwo-EX (BREAKthrough), averaging 6.7 overall. A grade 10 copy sells for around $803, about 19× the $42.68 raw price, so high-grade copies are worth grading.