This is the craigslist post:
Single speed bike $199 OBO [MENTION=366249]GhostSS[/MENTION] do you mean just waiting on craigslist? I am also going to a few used bikes shops tomorrow as well to checkout what they have. My main thing is I want a singlespeed that has the aero-dynamicism of a road bike with the benefit of having a single gear. I think this may be it, but I really have very little idea.
I had to email the guy to get more info (which I put above). I was drawn by the color and the seat

but of course those are the least two important things. The front cog looks shiny/brand new and the whole bike looks really clean and taken care of.