The Sancho one was always fecking weird. We were in for him, we were quoted a mental fee, we didn't sign him. Fair enough. The only issue was the management thinking we'd got a bargain a year later for a complete waster just because it was only 2/3 of a mental fee.
Maguire and Antony the board were letting the managers down though. Moving for them in a timely way would have saved both money and pain from having a shite squad and unhappy manager. Now obviously you could say we shouldn't have signed them at all but that's also on the board - they need to propose an alternative signing that's acceptable to the coach and then go and get them instead.
Dithering and then overpaying on panic buys once the shit is hitting the fan has been a hallmark of the Glazers' time here ever since Fergie retired. Fellaini, Mata, Maguire and Antony being the most obvious ones but you could argue AWB, Casemiro, Amad for example might also fall in that bracket. Contract renewals too might show a somewhat similar pattern as we've overpaid due to not being willing/able to acquire a replacement and move on. Martial, Rojo, Jones, Henderson, and De Gea (I liked him but £350k/week when he'd been playing silly buggers and tried to move to Madrid!) spring to mind.