Don't think it is a real ad, but ---
http://sfbay.craigslist.org/sfc/bid/3032303570.html
Motorized Bicycle - $250 (SF)
Date: 2012-05-22, 6:38PM PDT
Reply to:
3bhxt-3032303570@sale.craigslist.org [Errors when replying to ads?]
Runs great.60 mpg .Cut through traffic with ease.