Disklavier

I've got a 10 year old dc6 in excellent shape in the north san 
francisco bay area.  I'm wondering if anyone knows what I could 
expect to get for it, either dealer or private sale.  Also, best way 
to advertise it, and how is the used market for these - does it take 
long to sell one.  I'm looking to get a new or used dc6a, so any 
information on one would be appreciated.