If so, then THE store is the atelier of Francois Charle http://www.rfcharle.com/ A beautiful store in an historic set of buildings in a gorgeous part of Paris.
The Bernunzio 3M is fairly pristine and priced like it (a bit high, IMHO); the Mandolin Brothers 3Ks have both seen a lot of living (one more so than the other) and are priced fairly (although both have been in stock a while and Mando Bros usually seems willing to haggle a little when that happens...)