I don't think the problem here is whether Vidal wants to stay or not. I think everyone unbiased can understand that Vidal is fine here. If a deals occurr, is just because of a big offer that would help the team's financial situation in a present and future perspective. If someone thinks Marotta will sell him for anything under 70M is deluded, given the words he has said about the matter, and the circumstances (transfer window is closing) we are in.
I don't think the deal will happen at all actually, but in the transfer market you never know. I don't think there are, as of now, situations to be worried about, since the only reliable source (GDM) has said there is not nothing, and United has already spent 75+bonus on Di Maria. We might already stop the speculation, given that we're not Manure United fans.