Maybe he won't be signing for Bayern. Nevertheless that's Kagawa, Götze and now Lewandowski left their club in consecutive summers. Just as Rooney openly expects United to remain competitive in the transfer market, so too should Reus of Dortmund. They lost Kagawa for €12M, most of the money earned on the Götze transfer was spent on Mkhitaryan (who's nothing like the same talent) and Lewandowsi is leaving on a free. That's a serious downgrade in quality by anyone's standards, with a net profit of less than £20M - in other words, after selling Kagawa, Götze and Lewandowski (and buying Mkhitaryan), they couldn't have bought Soldado in the summer.
Maybe it's not just us who suck at transfers!