It's a decime from the Bordeaux mint. L'an 8 is 1799-1800 and my Krause (KM 644.8) says 7.50 for very good, 15.00 for fine, 35.00 for very fine and 150.00 for extra fine. I'm a notoriously tough grader so I'll leave that for others opinions. Nice coin, and welcome!