TCGrader's AI has graded 55 copies of Team Rocket's Mewtwo ex (Destined Rivals), averaging 8.8 overall. 71% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $1,450, about 2.8× the $518 raw price, so high-grade copies are worth grading.