Yzingerr,
You will want to look at Makarov.com, for all of your questions and research.
S.O.G. International had Bulgarians for 109.00, and are still advertising them, but I'm not sure if they have any. A few weeks ago they were out. Try searching GunsAmerica.com, or Gunbroker.com; they usually have a few for sale. The bugies are not C&R, so they will have to go through the FFL.
As for country of origin. Most will tell you that bugies are not as "polished", lots of machine marks, but the cheapest-110-175?. Both Arsenal(commercial), and Military available. Military versions more expensive.
E. German-nicest bluing, triggers usually the smoothest, but that's from the use. Very few machine marks. Cost around 200.00???-250? I'm not sure anymore on the value. Someone else needs to help with that.
Commercial Russians. Nicer than Bulgies, not as smooth as E.G.s. Harder to find. Available in Hi-cap versions. Cost?-250-300? Again, not entirely sure on that.
Military Russians-rare Expensive! 350 to 400? The 400 might be pushing it a little.
There are also rare Chinese variants. But you will need to ask an expert about them. I just know they exist and are expensive.
What's the best? They all work! Period. I like the looks of the E.G.s. Very nice triggers. My favorite is my Hi cap Russian. I polished the trigger to a satin smooth pull with a crisp let off. Nice adjustable sights(just don't lose the parts!). I keep putting off buying another Bulgie, but I may have talked my self into another one. Try the bulgie first and see if you like the gun. You will, then start looking for the more expensive versions.
BTW, I paid 99 for the EG, 110 for the Hi cap Russian, and 90 for the first Bulgie. But that was several years ago......