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.
There are two main cities on the coast of Bulgaria and the one in the North is Varna (Burgas in the south is the other). Property prices in Varna have seen a great increase over the last few years. From very reasonable prices of around 500 euros per sqare metre in 2003 there are now properties selling at triple that value in the centre of Varna.
Varna is a lively town with much to recommend it. The sea gardens are a beautiful area for walkers and the the main boulevard hosts many fashion shops and quaint restaurants.