Dialga #121 from Vivid Voltage is a reverse holo holo_rare card that currently sells for about $1.52 ungraded, with graded copies ranging from $17.99 at grade 9 to $22.00 at grade 10. A grade 10 copy sells for around $22.00, about 15× the $1.52 raw price, so high-grade copies are worth grading.