http://cgi.ebay.ca/1942-BSA-Airborne...item53e608879b
Above listing is for a BSA folding bike on ebay. The seller tried to sell it in two parts (frame and crank in one auction, wheels and brakes in another) but the buyer forgot to ask his wife if he could buy it so it has ended up being offered again. It would have sold for a little over $1050.
It is now reaching $1000 with 5 hours to go. (Edited to add: sold for $1140). This bike actually has about the same amount of original parts (maybe even less) than what I started with. The wheels and tires, one crank, all the brakes are not original to a para bike, and the seat is altogether missing. Handlebars are bent.
When I got this pile of bike, I was embarrassed by what I had. There wasn't a lot there, and it was pretty weathered. I am starting to think that it may turn out OK.
There are a couple of other BSA bikes on ebay now, in the $3,000 to $4,000 range. Not selling mind you, but listed at those prices. Where does the madness end? I have bought Jeeps in running and roadworthy condition for less.