Thundurus #50 from Legendary Treasures is a holo holo_rare card that currently sells for about $2.29 ungraded, with graded copies ranging from $12.42 at grade 7 to $81.00 at grade 10. A grade 10 copy sells for around $81.00, about 35× the $2.29 raw price, so high-grade copies are worth grading.