Shapers' Sanctuary #206 from Ixalan is a foil rare card that currently sells for about $1.69 ungraded, with graded copies ranging from $5.58 at grade 7 to $1.00 at grade 9.5. A grade 9.5 copy sells for around $1.00 vs $1.69 raw. That's a modest premium, so grading only pays off for near-perfect copies.