Mysterious Shard #81 from Crystal Guardians is a reverse holo uncommon card that currently sells for about $2.86 ungraded, with graded copies ranging from $28.56 at grade 9 to $83.21 at grade 10. A grade 10 copy sells for around $83.21, about 29× the $2.86 raw price, so high-grade copies are worth grading.