If you want something with a coupled rangefinder in that price range it won't be easy. Maybe a Voigtlander Bessa II with a Color-Skopar instead of the more desirable Heliar. There are also older Fuji 645 folders that are supposed to be good if you can find one in decent shape.

My compact is a Perkeo II with an uncoupled shoe mount rangefinder, though it's not much harder to carry the Bessa II in many instances. The Bessa II will fit in a jacket pocket or a briefcase easily enough.