Mewtwo #10 from Base Set 2 is a holo holo_rare card that currently sells for about $31.65 ungraded, with graded copies ranging from $64.00 at grade 7 to $89.95 at grade 10. TCGrader's AI has graded 29 copies of Mewtwo (Base Set 2), averaging 7 overall. A grade 10 copy sells for around $89.95, about 2.8× the $31.65 raw price, so high-grade copies are worth grading.