So, you don't think offering Youkilis as trade bait wouldn't get the attention of some teams? I think Youkilis would net a really good player in return. This is a 30 HR 115 RBI guy with a .314 avg and a .390 OBP who has a gold glove at 1B and can play 3B, and he is in his prime. He would generate substantial offers. Lowell will get you an inconsistent middle reliever.
It's not my job to know what players are available. That's up to Theo and Co. It is, however, fairly obvious that Youk will bring value back, and Lowell will not.