Since I understand that I live in the poorest region of France -- Languedoc Roussillon -- I have made it my duty to buy local as much as possible... not difficult, really, when it comes to wine, fruit and veg.
The whole of my alimentation canal was wonderfully warmed by a 5 € cab sav from les Maitres de Cabestany, and I recently sipped the most interesting rose I have ever tasted in a local tapas bar (12 € for a half bot). The well-designed label, dubiously named "Seduction", said it was from a Rivesaltes vineyard -- but when I searched for further info online, the only source I could find (exactly same label) was Provence... Nothing for it, I suppose, but to return to the bar and ask for the lowdown there.
An American friend and I could be glimpsed at the end of a France 7 programme that featured a bio wine bar (Via del Vi) that we frequent before and/or after concerts at the newish Archipel Theatre in Perpignan. Both food and wine have always been really tasty for a reasonable price (15-20 € a bot). One could, but I can't, spend much more...
As you can probably tell, I'm not really a wine buff -- I only take notice when I come across something outstanding, IMO -- but for daily imbibing, supermarket wine for 3-5 € will do me fine!