Mega Diancie ex #41 from Phantasmal Flames is a holo rare card that currently sells for about $1.36 ungraded, with graded copies ranging from $7.50 at grade 7 to $25.00 at grade 10. A grade 10 copy sells for around $25.00, about 18× the $1.36 raw price, so high-grade copies are worth grading.