Team Magma's Mightyena #21 from Team Magma vs Team Aqua is a rare card that currently sells for about $198 ungraded, with graded copies ranging from $385 at grade 7 to $11,950 at grade 10. A grade 10 copy sells for around $11,950, about 60× the $198 raw price, so high-grade copies are worth grading.