Go to https://www.cgb.fr. You should be able to find a lot of your coins for sale there with prices in euros. If you don't see them, there's a link there to Le Franc III, a standard but now dated French coin guide (prices are in francs, so it dates to around 2000 - at that time conversion was about 7F/1$US). The newer Franc VII is not on-line and will cost you a bit, but is worth it if you're getting into French coins.
"Two minutes ago I would have sold my chances for a tired dime." Fred Astaire


















