As a bookseller, i'm always amused at some of the fakes on ebay that people bid on.
here's one:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=29223&item=6936523932&rd=1
If you look very carefully at the signature, Stephen King's last name is spelled "Knig"
"Ah, Mr. King, thank you for autographing my book, but, umm, i think you spelled you're last name wrong"