Slowpoke & Psyduck-GX #218 from Unified Minds is a holo rare card that currently sells for about $306 ungraded, with graded copies ranging from $241 at grade 7 to $2,100 at grade 10. A grade 10 copy sells for around $2,100, about 6.9× the $306 raw price, so high-grade copies are worth grading.