Gengar #13 from Expedition Base Set is a holo holo_rare card that currently sells for about $285 ungraded, with graded copies ranging from $461 at grade 7 to $11,500 at grade 10. TCGrader's AI has graded 5 copies of Gengar (Expedition Base Set), averaging 8.2 overall. A grade 10 copy sells for around $11,500, about 40× the $285 raw price, so high-grade copies are worth grading.