I have made good experience with Peter Loy. He is not settled on any brand or type of camera, but most of his stock consists of Leica and vintage MF/LF gear. He has other as well as some newer cameras in stock though! I bought my Hasselblad from him, at a very fair price and in tremendous shape. His rating is very honest. My camera was sold as "with slight signs of use" but I found it virtually as good as new.

http://www.peterloy.com