Kingdra ex #12 from Shrouded Fable is a reverse holo rare card that currently sells for about $1.49 ungraded, with graded copies ranging from $10.00 at grade 9 to $29.99 at grade 10. A grade 10 copy sells for around $29.99, about 20× the $1.49 raw price, so high-grade copies are worth grading.