Once again the issue comes down to FSG not wanting to spend the money...I think everyone knows you are going to have to pay him, the issue coming with anyone who wants parity or something similar.
I heard a friend say, although how on earth he would know, that VVD has something in his contract saying that he has to be the top paid player. I wonder if that is perhaps, if true, the sticking point as if they pay Salah then they have to bump the rest.
If that is true then personally I would say sell VVD as he doesnt look anywhere near as assured as pre injury.
If you are going to get rid of any of the front 3 then it would be Firmino first then Mane, but no way Salah