Luiz, Great camera for sure. Recently I found left-handed Leica in the soviet postcard set, issued in 1988 to commemorate the 150th Birthday of Photographie. This set including 18 cards with vintage (1920'-1930') cameras from Moscow Polytechnical Museum.
Aidas you are very lucky that you are close to the source! :) You actually can find Russian cameras when you go to flea markets... all I find here are Kodak Junior No.1... meh!
Vlad, Unfortunately my top camera source is eBay and some other e-shops indeed. I was very lucky few years ago to find some interesting stuff locally. Now the flea-markets are empty of cameras while at least 10 lithuanian camera collectors are scrabbling around daily to find something special ...