Hi SPD-
It looks like no one so far as actually taken your question at face value, and I think it's an interesting one. I'll give it a shot.
Sullinger is in year two of a rookie contract. His health concerns are not gone, but things are looking better. They won't really go away until he has played a couple healthy seasons and significantly improved his body. His level of play right now suggests solid starter with the potential to be a fringe all-star if everything goes right.
It does depend who you are trading with, of course. Bad teams would rather have picks. Good teams would rather have players. Capped teams don't want contracts. Etc
This is guesswork, but I'd that's worth a top-5 protected 1st rounder or an above average mid-career starter who is cost controlled for a few years. Here's a completely imaginary tier of assets that I'd put Sullinger in with:
(1) a draft pick in the 6-10 range
or
(2) a very good sub-all-star veteran who is fairly paid or slightly overpaid and not a 7-foot center (Paul Millsap, Andre Iguodala, Josh Smith, Zach Randolph)
or
(3) a very good rookie deal player who probably does not look to have all-star in his future, and is not a 7-foot center. Basically a player like him (Kemba Walker, Kahwi Leonard, Harrison Barnes, Terrence Ross)
Don't ask me if I think the owners of these assets would do one-for-one swaps, because it's also a matter of style, cap situation, and outlook
depending on who's available this year between 6-10, I might agree but it would have to be a draft as stacked as this one.
I disagree with #2 -- take Sully who's producing at their level for much less money.
Disagree with #3 too -- Sully's at a level those guys hope to reach and Sully continues to improve
hmm...Green glasses I think.
Smith, Iggy, Millsap, Randolf are all better players than Sully overall. Sully is average 13 and 8 on the 4th worst team in the NBA. All four of those guys have put up comparable (or better) numbers in the past on legit playoff teams.
I don't agree with you on #3 either. I think Leonard is at a higher level than Sully right now, likeise Barnes probably. Both of those guys have been producing sully-type figures on much, much better teams.
The fact that Boston is so bad exhagerates how good Sully is. Our #1 scoring option is Jeff Green at 16 a game. Our #2 option is Bradley at about 14 a game. Sully has been the #3 option for most of the season despite being on a bad team.
If Sully was as good as everybody thinks he is, then he should be putting up at least 18/10 on a nightly basis for a team as bad as this one. Either that or he should be putting up his current numbers with insanely high efficiency (i.e. 55% FG).
He's doing neither - he's scoring around 13 points a night on around 45% from the field, on the 4th worst team in the NBA.
Take a look a a guy like Tyreke Evans. As a rookie he was scoring around 20/5/5 on a bad team, and he never became a superstar. Demarcus Cousins is becoming a superstar, but he has averaged aroudn 18/9 every year for Sacramento while shooting similar percentanges to what Sully is putting up now.
Sully is a nice player, I like his toughness and his skill set...but I still think that people here overrate him dramatically. I seriously doubt Memphis would trade Randolf for Sully straight up (even if the salaries matched) - same with Millsap, Iggy and even Smith.