Mega Gengar ex #284 from Ascended Heroes is a illustration_rare card that currently sells for about $1,164 ungraded, with graded copies ranging from $823 at grade 7 to $2,200 at grade 10. TCGrader's AI has graded 121 copies of Mega Gengar ex (Ascended Heroes), averaging 8.7 overall. 60% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $2,200 vs $1,164 raw. That's a modest premium, so grading only pays off for near-perfect copies.