Carol,
there are several English-speaking Estate Agents in and around Gourdon, and before settling here in Correze (cheaper!) we used a very helpful crowd in Cazals called Charles Loftie. Haven't got their detail to hand but they have a website and are very easy to talk to.
Cazals is just South of Gourdon en route to Prayssac. Nice part of the world in the Lot and good shopping and nice people - English and French.