Oops forgot to address the other parts of your query! In my opinion, the reliability on the listed French parts is as good as comparable parts from the era, with the excpetion of the Maillard Helicometic hub, which do have a poor reputation. To make things worse, replacement parts for the hub are hard to come by. So I'd remove the wheels and make sure the axles spins smoothly.
As for price, that varies so much depending on the local market conditions, that it's very hard to judge. Then there is question of mechanical and cosmetic condition. Assuming it is a mid 1980s PGN10, original price would have been around $400-$450 US.