It takes a lot of time and good searching skills to get deals like Ole got. Many lenses are not listed clearly and I find that I spend a lot of time sifting through poorly described auctions looking for something of value. I've gotten good deals on things over the years, but nothing quite like that.
Thanks to everyone for the really useful info provided. I'll certainly know what to look for when i finish building this camera. For anyone thats interested i'll post some pics of it on the camera building forum, when i eventually finish it...