Former Southampton academy coach Paul Williams insists Luke Shaw will prove value for money at Manchester United.
The ex-Saints fullback signed for United last week in a £30 million deal.
"I think for that money you will see later on in life that he will be a bargain," Williams told talkSPORT.
"Luke potentially has a long way to go in his development and you will see the best of him at Man United.
"He's chosen Manchester United because of their record in bringing players through. He'll look to stay there for a long time."
