Misty's Tentacruel #10 from Gym Heroes is a holo holo_rare card that currently sells for about $12.75 ungraded, with graded copies ranging from $36.00 at grade 7 to $49.99 at grade 10. A grade 10 copy sells for around $49.99, about 3.9× the $12.75 raw price, so high-grade copies are worth grading.