Revavroom ex #224 from Obsidian Flames is a holo illustration_rare card that currently sells for about $4.04 ungraded, with graded copies ranging from $8.00 at grade 7 to $56.99 at grade 10. A grade 10 copy sells for around $56.99, about 14× the $4.04 raw price, so high-grade copies are worth grading.