I think it was a sensible move registering a .be in French. Good on ya. That said, you'll probably need an end-user to fully appreciate its value. If you are prepared to wait 'til .be settles in, then i'd suggest mid $xxx quite possibly.
In France there is a telco called Neuf so neuf.fr would obviously be worth $$$$
but neuf.be ? Wait in case they want to set up a subsidiary in neighbouring Belgium