Wurmcoil Engine #368 from Double Masters is a full art / borderless mythic card that currently sells for about $13.44 ungraded, with graded copies ranging from $32.69 at grade 9 to $36.00 at grade 9.5. A grade 9.5 copy sells for around $36.00, about 2.7× the $13.44 raw price, so high-grade copies are worth grading.