Greedent ex #179 from Obsidian Flames is a holo rare card that currently sells for about $1.46 ungraded, with graded copies ranging from $10.00 at grade 9 to $40.00 at grade 10. A grade 10 copy sells for around $40.00, about 27× the $1.46 raw price, so high-grade copies are worth grading.