Thanks for the tip-off Paul. Frank's prices are, quite frankly, priceless! $18k for a smudgy looking felt-tip autograph/inscription seems a touch full. Having said that some of the "all four" examples seem even more over the top to me.
I thought that I'd add this example of an authentic 1980 John Lennon autograph to the ones that I posted earlier just to show that Paul didn't invent ugly Beatle autographs a few years ago!