Hi,
In your shoes I'd only buy the Zorki 1c to get the feel of a 30's design camera on the cheap. That's not derogatory, btw, just factual.
The other way to get the feel of a 1930's camera is to buy a Leica from that period (expensive) and then put a film through it (same price as the Zorki film) and then (probably) get it repaired and brought up to specification (very expensive). That's my experience and I've owned and used far too many Leicas in the last 40 to 50 years.
On the other hand, there's the FED copies of the Leica model II which were made in the 50's and so are not so old, plus they have coated lenses (good ones) and, although what you get will be a matter or luck (just like old Leicas) when you get them repaired and checked you'll find OLeg is far, far cheaper but just as good as (say) British repairers. Plus Oleg doesn't tell you shutter blinds have to be individually made at a cost of 150 quid...
The Zorki is a slight improvement on the FED 1 and the same applies to it that I mentioned for the Leicas and FEDs, in other words, they are all old and second-hand and may need a bit of work. Above all you should regard them as a fun project and not get too serious. They'll turn out decent photo's for you but are a bit of a hair shirt at times.
I've both Leica II's and FEDs and once they've had the treatment they feel and behave exactly the same. But the Leica lens is uncoated and the ex-USSR ones are coated. Remember; Leica dear, FED and Zorki cheap.
And if you just want to know what it's like owning and using a range-finder then every maker did one at some time; Ricohs are cheap, Canon and Nikon are dear and Olympus are somewhere in the middle. There's all sorts of styles with different metering etc and they'll all have weird problems sooner or later like light seals, battery compatibility and so on..
Plus you should know that on ebay a lot of sellers think cameras that are not SLR's are all range-finders. Even the ones called something FF for "Fixed Focus" like the APS Canon IXUS FF. And especially the Olympus Trip 35...
So do the research, draw up a list and happy bidding.
Regards, David