Sanchez would be a right fucking tool, if he signed for Utd at this point.
They would not be signing him to be part of something, they would be signing him because they are fucking desperate for anything & saw he might be available, so they can throw him into the mix & hope it works.
City would be signing him, to fit into a well oiled machine, because the manager knows how he plays & we want the extra he brings, to help win stuff, for some years.
My only question, if I was Sanchez, would be to Pep. I would want his word, that he plans to hang around for a bit, & not fuck off after my first full season.
There can be no other things to consider unless he is a fucking idiot (& very greedy).