Well any details over rooney's sale like the price?? If the price is very good then you may as well sell him as i believe there are many world class replacements for a striker.
Put him in reserves and stick him back later. Also have a go at him in private chat and threaten to sell if he plays bad. He'll improve within a few months generally.
Also if you get alot of money for him then by all means yes. Lots of repalcements for ST position.
Yeah I'm not too worried about Hargreaves or Van Der Saar. Both their contracts expire after season 1. And now that you've mentioned the 25% thing I'm just determined to keep Rooney and make him happy.