A cheaper option than buying OM is the old gendarmerie in the Pyrenean village of St-Pé de Bigorre. Complete with two cells the 98m2 is on offer at 16350 euros. Could make a nice holiday home. The building is being auctioned on the internet site agorastore (link:
http://m.agorastore.fr/Produit/74489#key=produit) from 13th May.
