Gholdengo ex #164 from Prismatic Evolutions is a holo illustration_rare card that currently sells for about $50.57 ungraded, with graded copies ranging from $20.50 at grade 7 to $159 at grade 10. A grade 10 copy sells for around $159, about 3.1× the $50.57 raw price, so high-grade copies are worth grading.