I think a solid realistic haul for Butler is this:
Bulls receive:
G Avery Bradley
F Jaylen Brown
C Tyler Zeller
Memphis 1st
Celtics receive:
G/F Jimmy Butler
PG: IT, Rozier
SG: Butler, Smart
SF: Crowder, Green
PF: Jerebko, Olynyk
C: Horford, Johnson
I think that's a trade that gives the bulls a ton of young talent, role players, cap relief, and pick. We keep a majority of our core and also keep our depth into the bench. We could probably bring in a veteran off of waivers that could strengthen our frontcourt