But will the moves happen before Monday night? It seems so, according to the bookies as we take our final look at the transfer probabilities based on players' shortest-priced moves.
Baines is over 90 per cent certain to move to United while Fellaini is over 80 per cent certain to end up at Old Trafford. As for Herrera? The bookies aren't even taking bets on him any more, meaning they're as near as dammit 100 per cent sure that a move is going through.
United are also almost certain to conclude a deal for Ezequiel Garay, according to the odds, suggesting that David Moyes is in for a very busy 72 hours or so.
For Arsenal fans the news isn't anything like as good. We've not done this before, but here's the latest odds of the players Arsenal have been linked with. You'll notice that Mesut Ozil isn't on the list - this is because we only collate odds for each player's shortest-priced move, and Ozil is 7-1 (a 12.5 per cent chance) to join Arsenal but 15/8 (35 per cent) to join Manchester United.
In other news, Gareth Bale's sale to Real Madrid is STILL yet to go through, despite the entire world of football being on tenterhooks for about a month now. That's made the bookies think that perhaps it won't happen after all - the odds have been trimmed ever so slightly from 97 per cent last week to 95 per cent.