Photo courtesy of Footballholic.net
Club captain Nemanja Vidic is certainly the biggest name on this list, but he has repeatedly been linked with a move away from Old Trafford in recent weeks.
Juventus, Barcelona and even Russian side Anzhi Makhachkala are reportedly interested, though Vidic himself has moved to quash such speculation.
Anything could still happen of course, and one has to wonder if Vidic would be able to resist the lures of a new challenge in Barcelona or Turin for instance.
But from a United point of view, the situation is somewhat difficult. They are currently incredibly short-staffed in the defensive department, thus selling arguably their most reliable centre-back would seem borderline ridiculous.
But at 31 years old, age is no longer on his side, and he is somewhat susceptible to lengthy spells on the sidelines due to injury as we have seen time and time again.
So should United cash in on their skipper?
In the short-run, I would have to think not. His presence, both on the field and off it, is vital to the club during a time when younger stars such as Phil Jones and Chris Smalling are being eased into the first-team fold.
But if an equally adept—and less injury-prone—replacement can be secured, perhaps the sale of Nemanja Vidic will not entirely be out of the question.
Stranger things have happened, that’s for sure.