Dialga-EX #122 from Phantom Forces is a rare card that currently sells for about $383 ungraded, with graded copies ranging from $711 at grade 7 to $24,500 at grade 10. TCGrader's AI has graded 6 copies of Dialga-EX (Phantom Forces), averaging 7.8 overall. 33% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $24,500, about 64× the $383 raw price, so high-grade copies are worth grading.