Laurent,

My first MF was and is a C3, initially with 80mm lenses only, later added a 65mm and a 180mm. And a paramender.

It's a very nice camera. The C330 should even be better (more recent, some added features).

As for the price: it sounds reasonable for what you get, including 3 (or should I say 6?) lenses, paramender, tripod.

If you do indeed have the chance to examine it before buying, especially check the shutters of the lenses at slower speeds. My oldest, chrome, 80mm has become "a bit" slow over the years (should really get it CLA'd). I always forget which setting is the correct one, but on either X or M the shutter should work fine.