Vaporeon ex #23 from Prismatic Evolutions is a holo rare card that currently sells for about $4.08 ungraded, with graded copies ranging from $14.09 at grade 7 to $65.00 at grade 10. A grade 10 copy sells for around $65.00, about 16× the $4.08 raw price, so high-grade copies are worth grading.