The bessa R is a great little starter/beater rangefinder. they use focal plane shutters like modern SLRS as opposed to cloth sliding curtain shutters like older SLRs and rangefinders (M series).
The M's are a much quieter and smoother shutter system, allowing for better candid and low light images.
I'm pretty sure that back in the day I picked up my bessa R new for $250-300, so if they still make them, you may want to look into new.
If I were to buy in again, I'd look into a Bessa R3a or R3M (mechanical) which takes the m and screw mount lenses (with adapter) if I needed something more modern and not terribly expensive.
If budget weren't of a concern, I'd hit up the Zeiss Ikon, I've had my eye on that since it came out, but since having gotten out of film (though I'd love to get back into it!) I just cant justify it.
Good luck with your quest!