It’s set to be a busy summer of incomings and outgoings at the start of INEOS’ rule over football operations at Old Trafford.
And United could be ready to offer some players as part of the deal to knock down Brentford’s asking price.
Express Sport looks at six stars whom Erik ten Hag could put in the shop window for a potential move to west London to unlock Toney’s arrival.
Diogo Dalot has cemented his status as United’s first-choice right-back in recent weeks, leaving Aaron Wan-Bissaka’s future up in the air.
The Red Devils have triggered a one-year extension option in his contract, but talks over a new deal are said to have stalled.
It has left a summer exit increasingly likely, and a return to London could interest Wan-Bissaka if he is to depart.
United accepted a £30m bid for Harry Maguire from West Ham United last summer when the former captain’s stock was at its lowest.
His surprise renaissance this term hasn’t changed the expectation that Ten Hag will return to the centre-back market later this year.
Another new centre-back could convince him to start a new challenge elsewhere, and Brentford may offer a Premier League stay.
Like Wan-Bissaka, United have also triggered Victor Lindelof’s 12-month extension with little sign of agreeing a new contract.
There is a strong Scandinavian presence at Brentford, and Lindelof may be interested in the opportunity to become a regular starter again at another Premier League club.
He is currently fourth in United’s centre-back pecking order and could be even further down by the start of next season.
United welcomed interest in Scott McTominay last summer, but their £40m valuation wasn’t met. He has gone on the play a significant role this term.
However, Kobbie Mainoo’s emergence has seen him return to his role as an impact substitute, and now 27, he’s at the start of his career where he needs to start regularly.
The Red Devils may seek a transfer fee for McTominay, considering he’s an academy product which would generate pure profit. But Brentford would surely be interested in using him in a swap deal.
Christian Eriksen has one more year on his United contract beyond the summer, but he is another to have suffered from Mainoo’s brilliance.
The 31-year-old has simply looked past his prime this season, too, and could be interested in a return to the club that gave him a chance to resume his career after his cardiac arrest.
It’s unlikely Eriksen alone would chip away much of Brentford’s valuation of Toney, though, based on his age and salary demands.