there are a couple posted in the CL/eBay thread that are much better examples. Such as:

http://newyork.craigslist.org/mnh/bik/147696432.html

Or any number of Bianchi Pistas found on ebay at any given time. this is not new. I've been watching it happen for more than a year, ad it's probably been going on for much longer than that.

It's not so difficult to fathom either. Someone sees a fixed gear bike with no brakes, and no derailures, and thinks "that looks really hot!" who wouldn't think that. so they buy one, and discover that while it is really pretty they have no real interest in riding it. I can easily see Bianchi Pistas being an impulse buy. I DO wonder how someone can spend a grand or more on a bike they have no idea if they will enjoy riding, but I supppose it all depends on your perspective as to what seems expensive.