Mikokoro, Center of the Sea #241 from Masters 25 is a foil rare card that currently sells for about $31.49 ungraded, with graded copies ranging from $8.00 at grade 7 to $9.99 at grade 8. A grade 8 copy sells for around $9.99 vs $31.49 raw. That's a modest premium, so grading only pays off for near-perfect copies.