Injured?
Sully and Bradley 
Package them and a draft pick, what do we get.
A really good player, because teams don't just get to give up garbage for a 22-year old that has shown David West-potential, a 24-year old that has shown Aaron Afflalo 2.0-potential and a pick.
I would do it for Greg Monroe.
I would burn down Danny Ainge's house if he made that deal.
David West was a much better defender.
David West has never not played next to an imposing shot-blocker or behind an elite perimeter defender. The worst center he has played next to is Emeka Okafor. Between the Hornets and Indiana, West was the second line of defense for either Chris Paul or Paul George. Not surprisingly, the year Tyson Chandler left the team and CP3 went down with injury, West posted a career low in defensive rating (or should I say career high: 110 pts. allowed per 100 possessions).
There is neither a single statistic nor professional analysis that suggests that Sully is anything less than an average defender despite being surrounded by mediocre defenders.