I think Sullinger and the #17 would get you into the 5-8 range. I understand that unused draft picks have more value than actual players these days, but this is a fairly deep draft and a guaranteed solid up and coming player like Sully and a chance at a very good prospect who drops into the mid-teens would be enticing for somebody.
We all hope that Sully can come back next year in better shape and make 'the leap', but if he doesn't get any better, his value could fall quite a bit (see Greg Monroe - before the season, we were talking about trading Rondo for him. Now we are talking about a Green trade - and the fact is, he had another very solid season).