Other price data sources on the web
The french government maintains a price list for the whole country. It seems updated on a regular basis. Unfortunately, the data cannot be reused for free.
There is also Zagaz, a privately held site whose data are fed by individuals, like osmfuel. It has been created by two inviduals; they may agree to share their data.
--Cfoucher 15:00, 28 January 2010 (UTC)