The 16-year-old has made six Serie A appearances for AC Milan this season and is being widely tipped to become Italy’s new ‘Gianluigi Buffon’.
United have been keeping a close eye on Donnarumma’s development and want to sign the teenager before he starts featuring more regularly at the San Siro.
However, Raiola has put an unrealistic price tag on his young client in order to highlight his potential.
“Donnarumma is like Modigliani [a famous Italian painter] and is worth €170m,” he told Sport.
“He has a great future ahead of him and is an amazing guy, who is liked by all.
“He is still very young, but can become a champion player.”