Speaking on talkSPORT, Jeff Sterling said: "The transfer is going to happen, Everton need the money.
"Their biggest asset, their most sellable asset, is 21-year-old Jarrad Branthwaite. I think he will find himself at Old Trafford.
"Never mind Manchester City, it'll be Old Trafford because with the likes of Jonny Evans, Raphael Varane, Victor Lindelof and Harry Maguire
"All ageing players, Manchester United need to bring in some youth and I'm thinking £45 million, something like that, would do the job."
Man City have recently emerged as potential rivals to Man United in the race to sign Everton centre-back Branthwaite this summer.
The Toffees are believed to be open to a deal in the region of £60 million so it could be matter of which clubs offers more money in the end.