TCGrader's AI has graded 9 copies of Koraidon ex (Scarlet & Violet), averaging 9.1 overall. 89% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $15.00 vs $15.47 raw. That's a modest premium, so grading only pays off for near-perfect copies.