Rotom ex #29 from Phantasmal Flames is a reverse holo rare card that currently sells for about $1.39 ungraded, with graded copies ranging from $13.37 at grade 9 to $47.79 at grade 10. A grade 10 copy sells for around $47.79, about 34× the $1.39 raw price, so high-grade copies are worth grading.