Naganadel & Guzzlord-GX #158 from Cosmic Eclipse is a holo holo_rare card that currently sells for about $8.50 ungraded, with graded copies ranging from $14.37 at grade 7 to $100 at grade 10. A grade 10 copy sells for around $100, about 12× the $8.50 raw price, so high-grade copies are worth grading.