Heliolisk #177 from Twilight Masquerade is a illustration_rare card that currently sells for about $4.77 ungraded, with graded copies ranging from $18.40 at grade 9 to $75.00 at grade 10. A grade 10 copy sells for around $75.00, about 16× the $4.77 raw price, so high-grade copies are worth grading.