I use a Contax IIIa regularly. The Contax cameras are far too nice to just sit on a collector's shelf. They should be used. And the lenses are wonderful!

I buy all of my Contax rangefinder equipment from Henry Scherer. He can restore a camera to like-new condition, and he will even select your gear for you. See his web site:

http://www.zeisscamera.com/

Robert