A bit late but I'm not sure that selling de Gea is such a bad idea. That is if Fergie is smart enough to sign Rene Adler then. HSV fans won't like it but Adler is a huge United fan and I can't see him resisting a good United offer. De Gea has all the talent but Adler has already all the class and another good 8 years in him.
Reminds me of the Bayern situation a couple of years ago, there'll always be scrutiny with a young GK.