I was at a photographic convention lately and some people there were carrying a Kodak Retina Rangefinder model. I want to get me one (if reasonably priced). But since I have no experience with these models - and they said not all models or lenses are as good - I would like to ask for your input.

What model should I get (I want a rangefinder) and what lens? Please your expert advise.
Bert from Holland