A Bessa II with Heliar is likely to run over $500, so I think you're looking at a camera with a Tessar or Skopar. A Heliar will be sharper in the corners than a Tessar or Skopar, and it's a nice smooth looking lens, but Tessars and Skopars are decent lenses as well.

I think a rangefinder is useful, particularly if you photograph things closer than 8 feet away, but of course a coupled rangefinder adds to the price.