I can't see Suarez leaving Barca, part of the reason he moved there originally is that his wife was from Barca and wanted to go back to Spain, so coming back to England would no make sense.
I think every player has his price, so Barca may well want to sell him or Neymar, they are supposed to be heavily in debt, so if a £100+ million bid came in they may sell, but more likely to someone like PSG.