TCGrader's AI has graded 7 copies of Sylveon-GX (Hidden Fates Shiny Vault), averaging 9.1 overall. 86% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $155 vs $178 raw. That's a modest premium, so grading only pays off for near-perfect copies.