>>3003420Zenits are like, the worst SLR.
The Zorki (aka Zorki 1) is good. The rest are rather bad.
Fed 2 is good; find one in working condition and it'll still work for the next owner. Contrary what the tripfag said, post-1960 is fine for Fed 2. It's the slow-speed mechanism that dies first in these cameras, and ones with that are trickier to set, so avoid those where possible.
Try to get either a zebra lens (because of the slightly better coating), or one with the finger-tab (earliest Fed 2's came with these) because they're from a period before QC started dipping and will likely be very nice to use. Whatever you do, get a hood for that lens. A Chinese 50mm Leica hood for a 40,5mm screw will do just fine.
All of these Soviet cameras have poor viewfinders. No framelines, no parallax hints, approximate framing. But the glass is really quite good for what it is: a $8 Tessar from the USSR. The Jupiter-8, despite being a f/2 standard lens, is neither as full of character nor as good value as the 50-ish mm Industars.