Fake Barks art can be found in the oddest of places. This piece was found on the Carl Barks Fanclub website!
Compare it to the drawing on the cover to Uncle Scrooge in Color and you can easily see that the above piece is a rather clumsy tracing with a fake signature.
Speaking of drawings that are not by Barks: The seller hailtotheseahawks recently *sold* two of the forgeries that "redwoodangels13" tried to sell some time ago on eBay. Be aware of this seller!