I sold a MINT Nikon FE black body with a mint 50mm f1.8 Nikkor and SB10 flash yesterday on craigslist. I met the buyer and he was very excited. He loved the camera and paid my full price no problem.
I offered him a few rolls of film and he said, "no that's okay - I just bought this for the lens!" What? He says to me, "this lens will autofocus on my D300!" I told him the lens will NOT AF and he said that it would - so I shoved the cash in my pocket and left.
By now the buyer must know that I was right, it will not auto-focus. Maybe he can photoshop the focus in! I think from now on, I am going to question the buyer and see what they are going to use the gear for. If I hear a digital use, I think I'll just keep the gear.