Magmortar LV.X #123 from Mysterious Treasures is a reverse holo holo_rare card that currently sells for about $16.50 ungraded, with graded copies ranging from $36.25 at grade 7 to $416 at grade 10. A grade 10 copy sells for around $416, about 25× the $16.50 raw price, so high-grade copies are worth grading.