Alolan Muk-GX #138 from Burning Shadows is a holo rare card that currently sells for about $4.73 ungraded, with graded copies ranging from $9.00 at grade 7 to $75.00 at grade 10. A grade 10 copy sells for around $75.00, about 16× the $4.73 raw price, so high-grade copies are worth grading.