Within Bulgaria

There are many people that bought 2 or 3 (or more) apartments on rural properties within one area, with the idea of maybe either renovating an older property and selling on, or to sell or rent out one apartment while living in another. Or maybe they have an apartment on the coast that they hardly ever use, or one in a ski resort that sits empty. My idea would be that maybe someone who had 2 apartments on the coast, might like to swap one for an apartment in a ski resort, or someone that had bought a rural property in one part of the country might prefer to swap for a house or plot of land in a different area. Or maybe someone just wants to move from the north to the south, or countryside to town.