I just moved to Paris, France about a month ago.
Not speaking French yet, starting to learn since it was a last minute move.
So I Googled and found Rue Vivienne to be the spot, and the only problem that it is closed on weekends which the only free time have. I did drop by once on Saturday and there was this one shop (more of a bullion rather than numismatic shop) open. So I asked in English for a 50 francs random dates and it was 20€. Which for me was a bit pricey compared to places like Godot et Fils.
So I am not really sure if I was charged extra coz I spoke English or because it was a Saturday. Or maybe that place is a tourist area. Any heads up would be great.
Also I tried Clignancourt market, which was a huge area and very little coins. Didn't quite ask the price here because I was on a budget and afraid I would be rude too.
So I figured out I could ask here where or which exact shop has your highest rating and preferably (for now) that speaks English.
All and all...Paris is very beautiful and the people are nice here.
Cheers.