The best site for Bulgarian Property is EuroPropertyMap. For land plots and apartments in Montenegro click on montenegro property. There are also many tempting residences in croatia.
Prices in Belgrade continue to float upwards. The flow of foreigners into the capital is not likely to decrease. Many Serbs have also been returning for some time now. Zoran Dindic has mentioned that the government expects property prices to increase by half over the next few years; indeed it is hardly likely to be less that that figure.
However, the government clearly has the intention of greatly removing the restrictions to foreign investors, which presently can slow down the purchase procedure.
Don't miss a trip to Belgrade, which surely is the heart of the Balkans. There are many Spas and baths in the surrounding region which will ensure an enjoyable stay.