Hi,
And thanks for the input here. I am contacting the buyer in the morning that he of course can send the lens back. I'm just disappointed that he didn't realize or really research the Pentax-A very well. Here are several more photo's to look at, this, the pentax-a he says,
http://hacktastic.smugmug.com/Other/Gallery-2/i-RVJfZQr/1/O/IMGP4351.jpg and the next is from what he says is a 500mm sigma:
http://hacktastic.smugmug.com/Other/Gallery-2/i-qj2T2h9/1/O/IMGP4365.jpg.
His statement was he couldn't clear up the fringing in Photoshop lighthouse. All I have is Photoshop CS2 and I don't seem to have any trouble.
From his last correspondence I can conclude that he will not be happy with the lens with whatever solution is presented to him. I will do as you suggest and inform eBay as well that I am having the lens returned. Oh, and thanks, good to be here!