I reserved a car with CardelMar and saw a great difference of prices between them and other car rentals. The web site is in french so you have to understand at least basic french to rent there
Here is the address : http://www.cardelmar.fr/

What car do you get? a deux chevaux

There is a small box on the right side of the page (about a quarter down from the top) where you can choose your language. English is there too. Either U.K. or U.S.