Maybe big clubs don't actually rate him that much? He's good, but I think he gets a bit overrated. He's the best goalie in the league but after the game against Arsenal he was being talked up like he's the second coming of Lev Yashin, despite most of the saves being ones you'd expect from anybody decent.
Unless he pushed there's only Real - Barca seem to be a big no - and maybe now PSG who can afford to be bigger than United.
Thing for me about him is, sine he's gone to United, which is what, 5-6 years? - he's never seen a better player than himself come in. Good players retiring, leaving, less good players coming in, and the team deteriorating continually.
He's got far less Spanish caps than might be expected, and all he needed to do was fight to go to Madrid to gaurantee himself first choice.
So, I've wondered this for a while, but despite being a great goalkeeper, I suspect he might be a bit dim.