There are lots of good folders that can deliver the results you're looking for...
Like steven_e007, I too own several cameras, but hey, cannot say "no"... Within your price range, the ones that I use most and would recommend are:
6x9: Voigtländer Bessa RF w/ Heliar (coupled RF, also 6x6 if the mask is included), an Ensign 820 Special w/ Xpress (uncoupled rangefinder, this is dual format and the mask for 6x6 is always included) or, if you ever find one, a Balda Super Pontura (coupled rangefinder, not common at all, and probably well over your budget limit unless you're very lucky, but a great camera indeed)
6x6: Agfa Super Isolette (a bit over your budget maybe, the Isolette III with Solinar can be within your price range), Ensign Auto Range 220 (coupled rangefinder, also 6x4.5 with the included mask, cheap but reliable, can be found with Tessar lenses, but most frequently with an Ensar triplet) and +1 to the Mamiya Six comment.
6x4.5: Ensign 16-20 Auto-Range or Super Ikonta A
There are cameras, such as the great Welta Weltur, that can be found in different sizes. And a CLA will be almost mandatory for a camera that has used / been sitting untouched during / for the last XX years.
I must say that I do not rely on russian gear, I've repaired enough Iskras to know better than that. BUT that's just my own opinion, lots of people use them with good results. Just for me, it is simply not worth the risk.