I hate to sound negative about FSU SLRs but the problem is that Unlike Rangefinders, SLRs increased in popularity manifold leaving the Zenits behind.. used M42 and K mount Manual SLRs, even Pentax originals (let alone the usable recent chinese Centon copies) cost virtually nothing thesedays, same for Canon FD, Olympus OM, Minolta etc, the better models of which are far better than any Zenit - Heck you can pick up a wonderful Nikon F3 for a song (N`s last Manual Pro camera) so why bother with an FSU SLR? - don`t get me wrong, I appreciated the Zenit TTL , it gave me a secondary M42 camera for little money but I`d not bother now with F3s, FM2s and K1000s going for buttons...
FSU Rangefinders for me are a totally different story - the Zorkis and early FEDs have a similar appeal to the Barnack Leicas and unlike SLRs there aren`t any big name high end refined RFs available used for little cash - just new Bessas which have in a way, all the appeal of a Nikon F80 or Canon EOS 50 SLR 🙁 .. I`m enjoying shooting with the Zorki 4 - If I`d kept the Zenit, I`d never put a roll in it and just pick up my old F3 or FM2 instead..
Anyway for a laugh, have a look at this camera - It`s a Balda Baldinette II and just goes to show that even the Germans could turn out total worthless Tat when they wanted to - late 1960s vintage I think, all plastic and very thin aluminium, brightlines but no rangefinder, the shutter is an in-lens leaf type (and why there are only 4 shutter speeds no less) - I was amazed to see that the lens goes from F2.8-F22, that it has a sync socket! and that the case is mostly thick leather! - otherwise it`s little more than one step up from a Diana --- compared to this, my Zorki-4 is a Leica IIIG !! ... I got given it a roll of film