Gastly #177 from Temporal Forces is a holo illustration_rare card that currently sells for about $88.94 ungraded, with graded copies ranging from $86.18 at grade 7 to $500 at grade 10. TCGrader's AI has graded 8 copies of Gastly (Temporal Forces), averaging 8.9 overall. 75% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $500, about 5.6× the $88.94 raw price, so high-grade copies are worth grading.