Hydreigon ex #169 from White Flare is a holo illustration_rare card that currently sells for about $76.77 ungraded, with graded copies ranging from $59.93 at grade 7 to $68.00 at grade 10. A grade 10 copy sells for around $68.00 vs $76.77 raw. That's a modest premium, so grading only pays off for near-perfect copies.