Yes, I have one and although I have a lot of stuff listed for sale currently, my Belles 400A is not. Had mine upgraded by David Belles personally not too long ago(good man). As you may (or may not) recall, the Belles amps created quite a stir in the audiophile press when introduced as something of a new generation of superamp. I believe the 400A was about $1200 new. I do think his amps were and if you can find any (itself an indication) remain solid performers. Perhaps he is better known for his amps than his preamps I would say. His new creations are the OCM amps.
