Just wondering if someone has done long commutes(i.e. 20mi+) on a folder. really interested in getting one and play around with it.

Also a bike friday new world tourist popped up on my local CL: http://chicago.craigslist.org/wcl/bik/3754110037.html

Is it a good deal at $735? Not sure about the frame material/weight, but the component seems decent enough to me.

This is my first experience with buying a folder, so please advise me on what to look for, what to avoid, what parts of the bike to pay attention to, etc etc.