I also feel that the Soviet AK is, being the original, one of the most desirable variations out there. These are much scarcer, and hence costlier, than the Romanian, Egyptian, and even Polish kits that are currently available. And when the remaining Soviet kits out there are gone, I don't think our chances are very good that more will ever be imported.
I recently acquired one of the "trunnion-less" AKM kits that Sportsfag's Guide had for sale last year, and picked up a correct year 1972 Izhevsk front trunnion from Desert Fox Outfitters in Wickenburg, Arizona, after determining my kit was a '72 Izhevsk.
I then purchased 2 of the 1969 kits from RGuns, figuring that 3 nice Soviet AKM rifles should give me a nice selection to choose my build projects from. Not being one of the idle rich, I had to sell one of my RGuns kits, and plan to build the other one...and the '72 kit if I don't sell it first.
I am fortunate to have a few nice Polish AKM front halves, so I plan to use the barrels from a couple of these for my Soviet AKM's. If I didn't have the Polish barrels, I would use Romanians. To me, using any more U.S. made parts than absolutely necessary (standard legal disclaimer: gotta suck that federal 944(r) dick, you know) on a nice Soviet rifle is akin to blasphemy and sacrilege.
I have some of the fully heat treated and hardened 80% Polish AKM receivers from Cameron "Dark Knight" Childers at Childers Guns, and plan to use these. That way I still have a Euro/former Commie Warsaw Pact receiver (I am a Rifle Nazi Purist when it comes to things like that), but it also counts as one of Uncle Sham's good American made pieces of crap, which keeps the children safe. If the Polish receivers were not available, I would definitely go with 74ULLC receivers.
My RGuns kits are both beautiful and in excellent condition, and it took about a month from the time I ordered them to when they showed up at my front door. Both are 1969 Izhevsk. Trunnions, bolts, bolt carriers, top covers, and gas tubes are all stamped matching. The selectors and bolt springs do not match, but from what I understand this is typical and correct for these rifles, which have at some point gone through Soviet arsenal refurb.
I feel that built well using as many original parts as possible with top quality U.S. items ONLY WHERE ABSOLUTELY NECESSARY, these kits will yield collector grade rifles with investment grade appreciation as far as value and demand.