Mega Gengar ex #56 from Phantasmal Flames is a rare card that currently sells for about $2.76 ungraded, with graded copies ranging from $13.50 at grade 7 to $73.00 at grade 10. TCGrader's AI has graded 9 copies of Mega Gengar ex (Phantasmal Flames), averaging 8 overall. 33% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $73.00, about 26× the $2.76 raw price, so high-grade copies are worth grading.