I would be very surprised if Davis doesn't go to highest bidder and there will be more than a few gm's in the nba that will overpay (don't they always). So let Davis walk we have Gody who brings different things to the table, albeit not as much as Davis (now) but he can develop, another v good late draft pick by the scouts of the boston celtics and mr ainge!
Davis can give us minutes at center as well but the way Semih has progressed I think we'll be set for our 3rd string center for awhile. Glen is smoother offensive wise but Gody is possibly our best guy at boxing out AND getting rebounds.
The only trade guy I see at this point is Robinson if west comes back strong unless there is an unbelievable upgrade going to happen.