Mewtwo #56 from Brilliant Stars is a holo rare card that currently sells for about $1.99 ungraded, with graded copies ranging from $26.00 at grade 7 to $319 at grade 10. TCGrader's AI has graded 6 copies of Mewtwo (Brilliant Stars), averaging 9.1 overall. 83% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $319, about 160× the $1.99 raw price, so high-grade copies are worth grading.