Mewtwo #10 from Base Set is a 1st edition rare card that currently sells for about $830 ungraded, with graded copies ranging from $2,399 at grade 7 to $33,578 at grade 10. TCGrader's AI has graded 18 copies of Mewtwo (Base Set), averaging 7.9 overall. Only 17% scored 9 or higher, so genuinely mint copies of this card are scarce. A grade 10 copy sells for around $33,578, about 41× the $830 raw price, so high-grade copies are worth grading.