I honestly don't think Rafa will sell him. We're unlikely to see many bids for him due to his relatively poor season in the Championship, but he's shown enough in fits and starts to be a useful player for us.
I think he's better off as a striker than a no.10, but Rafa seems to be working hard on his positioning and movement and I think eventually it'll pay off.
He came good before and he will again, given time.