I would never give a team that wants to offload contract, an asset.. maybe some deep rotation player or second rounder, but that is it.. its like buying a merchandise from a person that wants to sell it quickly, for a market price..
Kings declined, and now one of two things can happen.. they will find some team that will accept their trade, or they will come back to you at the end..
for Adams there are only couple of teams that can absorb his contract.. and some of those do not need C.. so market for Adams is not huge..
it is better not to make a deal, than to make a bad one..