Crowder should be untouchable. If Ainge wants to build a "sustainable" roster, Crowder is irreplaceable.
I agree, and IMO people are throwing easily overpays for Butler, more than the Kings received for Cousins.
If we are going to look at recent trade history what we should consider giving up look at the Love trade. A first in Wiggins, a decreasing prospect in Bennett and salary but a solid player in Thaddeus Young (part of a 3 way trade).
So I would say the Nets 17, Rozier, and any combo of Johnson, JJ, and Zeller would be the most I would go. Maybe 1 or 2 late picks but that's it. Start Butler at SF. You then have Smart, Crowder, and Brown backing up the 1-4 spots (for small ball 4 lineups).
Also name a team where the Bulls can do better. That Nets pick is gold for a trade.