Sofia is a nice investment, especially if you pick up a good spot. There are a number of new callcentres being located there with an increasing number of foreigners moving in to work (language specialists) so like in Bratislava the housing market is benefitting. Sofia stands at a very good location in the Balkan region, not quite as good as Belgrade, but it's a stopping off point along the super route north and not as isolated as neighbours. While I'd curl my gums at the polluted Black Sea coast (except possibly Sochi) and the Bulgarian patch in particular, Sofia is a sound investment if you buy and rent right. An example is from my uncle who was driving through there with me, liked it, looked around and bought a 2 bed 62m2 apartment for €67,000 (fees etc included) near Joliot Curie St. and since 2005 has been bringing in €500 per month rent from (at 1st) Slovenes, Dutch, Bulgarian and now Serbian. If you've been there, liked the place, then have a look around.