Descend upon the Sinful #13 from Shadows over Innistrad is a foil mythic card that currently sells for about $1.77 ungraded, with graded copies ranging from $7.06 at grade 7 to $45.00 at grade 10. A grade 10 copy sells for around $45.00, about 25× the $1.77 raw price, so high-grade copies are worth grading.