Some people want to trade for Carmelo Anthony, but Horford is younger than Melo, a significantly better player, and a better fit.
We need a realistic assessment of how much a few months with the Celtics increases the team's chances of signing him, if Ainge was always going to offer him the non-Bird max this summer. If it goes from 10% to 30% or more, how much is that worth? It should have some value. (Imagine if, instead of Horford, we were talking about Durant. How much would that be worth to you?)
Trying to keep Olynyk instead of Sullinger in any deal is kind of like insisting that the Timberwolves take Sebastian Telfair.