Sabrina's Gengar #29 from Gym Challenge is a 1st edition rare card that currently sells for about $362 ungraded, with graded copies ranging from $575 at grade 7 to $21,700 at grade 10. TCGrader's AI has graded 3 copies of Sabrina's Gengar (Gym Challenge), averaging 7.6 overall. A grade 10 copy sells for around $21,700, about 60× the $362 raw price, so high-grade copies are worth grading.