Pikachu ex #28 from Prismatic Evolutions is a holo rare card that currently sells for about $3.08 ungraded, with graded copies ranging from $10.00 at grade 7 to $79.99 at grade 10. A grade 10 copy sells for around $79.99, about 26× the $3.08 raw price, so high-grade copies are worth grading.