Creeping Tar Pit #239 from Ultimate Masters is a foil rare card that currently sells for about $2.00 ungraded, with graded copies ranging from $34.95 at grade 9.5 to $37.00 at grade 10. A grade 10 copy sells for around $37.00, about 19× the $2.00 raw price, so high-grade copies are worth grading.