Relicanth #30 from Holon Phantoms is a reverse holo rare card that currently sells for about $3.24 ungraded, with graded copies ranging from $9.99 at grade 7 to $5.50 at grade 10. A grade 10 copy sells for around $5.50 vs $3.24 raw. That's a modest premium, so grading only pays off for near-perfect copies.