Mewtwo ex #151 from 30th Celebration is a illustration_rare card that currently sells for about $50.10 ungraded, with graded copies ranging from $152 at grade 9 to $611 at grade 10. TCGrader's AI has graded 23 copies of Mewtwo ex (30th Celebration), averaging 9.1 overall. 87% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $611, about 12× the $50.10 raw price, so high-grade copies are worth grading.