Sandy Shocks ex #56 from Prismatic Evolutions is a holo rare card that currently sells for about $1.34 ungraded, with graded copies ranging from $13.50 at grade 9 to $40.00 at grade 10. A grade 10 copy sells for around $40.00, about 30× the $1.34 raw price, so high-grade copies are worth grading.