75 million Euros is the fee mentioned, although the paper also states "the answer would be bound to be no, given that Real Madrid are only considering one option: a contract renewal for the player."
So, why report it? Well, I think anybody suggesting this is idle gossip can firmly be dismissed by this point - we know United are serious and believe there's a chance of this coming off. What's also becoming increasingly clear however, is that this will be a long game, where United will have to wait for Ronaldo to do something more drastic - make it clear he will not sign a contract, hand in a transfer request, reject an offer from Madrid - in order to give the transfer a chance of happening.
The article ends citing Ronaldo's frustration at Madrid pursuing other targets aggressively, including Gareth Bale, who has been touted as a potential replacement for the Portuguese winger should he leave. This one is going to drag on, but the information we have appears to be agreed on by a wide variety of sources now.