City of Brass #240 from Mystery Booster 2 is a rare card that currently sells for about $18.38 ungraded, with graded copies ranging from $28.00 at grade 9 to $31.00 at grade 9.5. A grade 9.5 copy sells for around $31.00 vs $18.38 raw. That's a modest premium, so grading only pays off for near-perfect copies.