Some reasonable trades. Obviously some are better than others and some would require additional trades, but I think they are all reasonable value for Pierce and would in theory be realistic for the teams involved.
3 Team
Bos - Gay, Bledsoe
LAC - Pierce, Arthur
MEM - Odom, Butler
Bos - Leonard, Blair, Jackson, Bonnar
SAS - Pierce, Wilcox
Bos - Barnes, Jefferson, Ezeli, Tyler, Jenkins
GS - Pierce, Melo
Bos - Granger, T. Hansborough
Ind - Pierce
Bos - Deng, Belinelli
Chi - Pierce
Bos - Sanders, Udrih, Dunleavy (thiw would depend on how much Ainge likes Sanders going forward)
Mil - Pierce, Wilcox
Aside from the Pacers one, these are debatable for me. I don't want Granger, though. He is nearly 30 now. Not a future asset.
I like Gay-Bledsoe the most. Gets a starting SF in return, and a very good 1-2 guy in Bledsoe to back up both backcourt positions.
GSW trade is good, but I don't think GSW will be willing to give up both Barnes and Ezeli.
If we aren't trading Terry elsewhere, I don't want Marco back with that Chicago trade, although I like his game.
For the SAS trade, Blair is undersized at C, so, if Sullinger is to stay as a future PF, they aren't a good combination in terms of size.
Bucks trade is a step for future. I like Sanders since he first showed up in Summer League in his rookie season. Getting him somehow would be great.