The only way I see us getting him is if he stays true to his word and is going for trophies and not cash. We'd surely be in for him @ 130-150k per week, and a 15 million fee. (Beats his 90k current deal by a mile too).
That's 30 million wages (7,5m / year) + 15 million fee = 45 million over 4 years.
If we sold him for say 7.5 million after 3 years (aged 31~), we wouldn't have to pay for his last years wages and would get 3 years for 30 million. If we kept him it would be 11 million per year for 4 years.
The numbers aren't that bad (for us or him!). But I seriously doubt he's going to look at us twice if he sees that offer. Juventus really need a world class striker and he'd be there main man. For City, Aguero, Balotelli, Tevez etc aren't exactly easy players to win starts off in 1-2 years time when he's in his 30's. From what SAF did to Berbatov this year; benching him despite him probably being able to churn out better performances this season (in the short term) than the 21 yr old Welbeck/Hernandez (24), because Berbatov in his 30's and isn't going to be playing for us soon anyways; tells me that he'll really have to rate RvP, because in 2-3 years time the 'now vs future' argument will be in full flow just like it was for the 10/11 golden boot winner (vs Welbeck/Chicharito).