I bought an A4000 from him a year ago, arrived promptly and works fine.
Later on, one of my workbench disks became corrupt and I emailed him asking if he could send me a replacement, and he did, no issues whatsoever.
Im sorry to see that people have had issues dealing with him, I found it very surprising to see that his Ebay acct has been cancelled. I can only postulate right now that he's going through some issues offline that have prevented him from completing his orders in a prompty manner. Bad Economy and all that.