I may as well join in the show: here's my Contax IIa - a black dial model with a newly acquired Biogon 21mm f4.5 super wide lens. It just arrived from KEH yesterday and I have spent the day shooting a couple of rolls of Reala around Sydney Harbour with it. I must say that I am very impressed with KEH - it was rated "BRG", ie likely to have more than usual wear and scratches, but it is actually what most ebay sellers would describe as excellent or even E+.
I also use the 50mm Sonnar f2 and was also pleasantly surprised by the results I got with it in China recently:
http://www.flickr.com/photos/10816453@N00/sets/72157600063945871/