Disklavier

I bought a Yamaha DGH1B11XG in November of 1999.  I have finally
decided that I should have gone to the DC2 model.  I have gotten a bid
from my local Yamaha dealer to exchange pianos and wonder if that is a
discussion that is allowed on this site?  It was a gruelling experience
to purchase the first piano.  Much harder than negotiating any vehicle
purchase.  I don't really want to start this process over but would
love to upgrade the piano.
Please respond.  Thanks