Jolteon #29 from Prismatic Evolutions is a reverse holo rare card that currently sells for about $1.20 ungraded, with graded copies ranging from $8.00 at grade 7 to $74.95 at grade 10. A grade 10 copy sells for around $74.95, about 63× the $1.20 raw price, so high-grade copies are worth grading.