I am sure that I may have missed some listings, but the last loose one I have documented is from 2 years ago, selling at $501 open auction. Last US NIB (open box, but unused) went for $900 in Nov 2015.
I disagree that the French one is more common than the US; I have seen far less of the French version than the non-French. AFAIK the unit/packaging is identical aside from the cover sheet on the French one.