I just bought a 2002 Focus SE with 17,500 miles on it. No complaints so far, seems like a great car. The only problem is that it only came with one key. I can buy a spare key on eBay , but the manual says that I need to already have two keys to program the new transponder, if I only have one key I have to buy a new key from a dealer and have them program it.
Of course I would like to save a few dollars, so if there is a way to program a new key without having two keys already, I would love to know about it.