This is a very unscientific list. I basically went through the salary pages (ESPN trade machine actually, since they had last year's expiring contracts still) and tried to pick out the players who were signed to long-term (4+ years) contracts as knowingly limited players. This kindof leaves out the Sam Dalemberts and Mike Dunleavys of the world who were given premium money based on youthful potential, height, or both. I don't think it's an insult to say that Nocioni has little of either.
The Bulls kindof know what Nocioni is: a quality bench player. He does some things well (3-point shooting, attacking the rim) but is limited. The league is littered with players who had put in seasons as good role players and were overpaid as a result. And it's not as much about the money as the commitment in years. Some of these guys don't make much but still are near impossible to deal because of the remaining length of the contract.
Feel free to add or remove names in the comments. Like I said this was just a glance at the rosters and using my memory to think of how long the contract was signed for at the time, what that player had done beforehand, and what the perceived 'fit' he had when signing the new deal.
There are some success stories on this list but not many. Nocioni may have had a better resume than a lot of these guys (he'll also soon be making more money than a lot of them too) but my reasoning behind this isn't that Nocioni is better or worse than the players listed, it's that he fits the profile of the type of player on this list: a long-term financial commitment to a bench player.