Heliolisk #177 from Twilight Masquerade is a illustration_rare card that currently sells for about $4.19 ungraded, with graded copies ranging from $15.49 at grade 9 to $45.00 at grade 10. A grade 10 copy sells for around $45.00, about 11× the $4.19 raw price, so high-grade copies are worth grading.