If we're talking a Boston/Atlanta swap... here's what I got for you:
Atlanta sends:
Al Horford (12 mil 3 years)
Filler (Brands' 4 mil expiring)
Boston sends:
Jeff Green (9 mil 3 years)
Brandon Bass (6 mil 2 years)
Crawford (2 mil)
Brooklyn/Atlanta's 2014 pick
Clippers 2015 pick
Why for Boston:
They are on the verge of the lotto already. They can shut down Rondo and Horford for the rest of the season. Losing Crawford, Bass and Green would be catastrophic for the season... we should plummet to the bottom of the standings while force-feeding minutes to Bradley, Oly and Sully. That probably nets us a Top 8 pick... next season Rondo and Horford come back and we'll instantly be a competent team. Also, if things continue to play out this way, Atlanta is getting Brooklyn's pick anyways... so it's little loss.
Why for the Hawks:
They lose the best player. They were the third best team in the East... almost a lock for the playoffs. Gaining Green, Bass and Crawford keep them as a playoff team this year. Also, they officially gain Brooklyn's 2014 pick without having to swap for it. That means they get to keep their pick as well... so even if things don't work out and they miss the playoffs despite adding Green, Bass and Crawford... they would have two lotto picks to build around (their own and Brooklyn's) as well as the Clippers pick next season.
Atlanta still probably says no. We could also swap out Crawford for either Fav or Oly if they'd prefer a replacement big. But presuming Atlanta then swapped out Milisap for Asik (Houston wanted Milisap), they'd then have a pretty solid lineup: PG - Teague, SG - Crawford/Korver, SF - Green/Caroll, PF - Bass, C - Asik ... good enough for the playoffs in this garbage conference.