Since the summer transfer window was introduced ahead of the 2002-03 season, Manchester United have spent plenty of money during the off-season.
Some of their purchases have enjoyed success at Old Trafford. Others have had spells for forget.
Here's a list of the 10 best deals United have pulled off during the summer transfer window. Weight has been given to the fee paid, what they achieved and whether they represented value for money.
Feel free to use the comments section below to agree, disagree or add your own.