We have been in France looking at old houses, and here are some of the ones we looked at. We didn't find anything to buy, but we were really looking at areas, and liked Brittany better than Normandy - Normandy is too far inland for us, we like the sea.
There are a lot of old houses that are up for sale, though the prices are set by the vendor so they ranges are a bit bizarre, and you can get a small house/cottage with is fairly habitable for the same sort of price as something with no roof. We are better informed, which was the aim of the holiday, and had a good time as well (which was the other half of the aim of the holiday).
For some reason Blogger has put these in a bizarre order and placement. Here is a beautiful roof beam in an old cottage in normandy
Cottage which could be really nice, but someone has put an awful dormer window onto it, and made a really bad job of the external pointing
Huge renovation project which would get you a 4 bed house, but needs a lot doing - the stairs are free floating at the bottom there
Weird modern bungalow thing on a nice plot but the "bedroom" is up the ladder and you have to a) climb over a roof truss to get to the bed and b) can only stand up if 4ft tall or less.