I came across this website a few moments ago and was intrigued by the company. The company started up in 1968 advertising a folding bike that weighed in at 17lbs with an all aluminum frame. It's an interesting story of an interesting English company that is still manufacturing FBs.

http://www.bickertonportables.co.uk/front

Someone in Phoenix is selling a used one for $130.

http://phoenix.craigslist.org/cph/bik/4345890354.html