Rakdos, the Showstopper #199 from Ravnica Allegiance is a foil mythic card that currently sells for about $12.00 ungraded, with graded copies ranging from $6.07 at grade 7 to $72.00 at grade 10. A grade 10 copy sells for around $72.00, about 6× the $12.00 raw price, so high-grade copies are worth grading.