I have a Penny Sherle Litho of the Big Eyed Girl sitting in a chair playing what looks to be a mandolin. It is signed Sherle and on the back says Penny Sherle Museum print editions. I saw the same print on a website which was framed (mine is not framed) and they were asking $250.00 and on another site the picture alone (not indicated whether it was Museum Print Edition) was selling for $7.99. If anyone can help as to why the price discrepancy and what, if anything this litho is really worth, I’d appreciate it. Thanks Cory