If he doesn't perform after one season it would be stupid to sell, but listen to us as if he is already ours

Yeah but hypothetically. For the sake of argument. Diego was different because he may have flopped but his wages weren't in the range of 8M, it wasn't as risky to keep him. Aguero is a risk if we don't make champions league we will be losing millions on his wages alone. What if he continues to fail? There would still be a great sum of money to make off him after just one bad season, but two and we would lose big time. Clubs may lose interest and he won't be willing to go to an inferior club. Those a the risks that the management will be thinking about if Aguero had a bad first season with us. I don't think he will though

he seems pretty much capable of succeeding on his own regardless of the quality of the squad. Although, we do see him play well with the likes of Forlan, Messi and Tevez

what's he like next to a more average striker like Matri or Quagliarella?