Ferguson remains keen to replace Patrice Evra.
United are reviving their interest in England international Baines, a player they spent much of the summer courting.
Ferguson felt Everton’s £15million valuation of Baines was a price too high, but the Old Trafford club want to re-open negotiations with the Toffees.
David Moyes will be loathe to lose the 27-year-old, who has been one of Everton’s players of the season.
But a big enough offer could be enough to tempt the Goodison Park club into selling the impressive defender.