I only think he will go if he demands to leave. Even though Moyes isn't playing him often, he did say at the start how important Shinji will be, as did Fergie when he left. They seem to like his work-rate, and perhaps is someone for his long-term plans.
If he does get sold, which I don't think will happen, I can't see us recouping all of our money based on his performances and playing time, £13 million maybe which is a steal for a team suited for him. I wouldn't be gutted if he left, but sad in the fact that he came nowhere near as good to what we were expecting, and my support of the player has lowered little by little in each game. I still have a bit of hope we can properly use him if we get some proper pace around him with some good movement too.