Gengar ex #104 from Temporal Forces is a rare card that currently sells for about $7.43 ungraded, with graded copies ranging from $12.00 at grade 7 to $45.00 at grade 10. TCGrader's AI has graded 4 copies of Gengar ex (Temporal Forces), averaging 9 overall. 50% scored 9 or higher, so a strong copy is achievable but far from guaranteed. A grade 10 copy sells for around $45.00, about 6.1× the $7.43 raw price, so high-grade copies are worth grading.