Looks like a Dahon or Dahon-copy. Auction says caliper brakes, but photo shows linear-pull. Also, something strange going on with the fork - it appears to be mounted backwards! Or maybe the handlebars & stem are backwards, depending on your perspective. Auction photo is small, so its hard to see clearly what's going on with the bike.
SanFancisco CL now has thumbnails in their classifieds, at least for bikes. I want this in my area too! Here's hoping that they're rolling it out site-wide, and currently only have SanFran covered because that's where it started from.
I actually went a looked at them back in January; one's in better shape/original condition the other has a cobbled on BMX handlebar setup. He wanted $50 a piece back then, don't know that's he's really changed his mind (he listed them this way then too).