I think Zeller, Olynyk, and Sullinger all have different strengths and weaknesses, and thus different appeal depending upon the team to which they're traded. That said, I also think Zeller has the least value to other teams, as he really can only play one position (center) instead of two like Sully and Olynyk can. Furthermore, he's got the largest cap hold next season, which in the year of cap frenzy, teams will care about. However, for us I think Sully has the least value, as he's a RFA next year, but also his role this year can probably be better filled by David Lee. I think Olynyk would have the most value, as he is cost-controlled for an additional season. So the times I propose trades with a big, I go with Sully if I think the other team needs less value, and Olynyk if they need more, because I think Sully is better for other teams than our own, and maybe the other way around for Zeller.