Here's a catch-up on all the players who the Blades bought and sold a decade ago...
1. Bought: Lee Williamson from Watford
The Jamaica international went on to play for the likes of Portsmouth and Blackburn Rovers. He's on the books of Kimberley Miners Welfare. (Photo by Clive Brunskill/Getty Images)
Photo: Clive Brunskill
2. Sold: David Cotterill to Swansea City
Cotteril went on to win League One with Doncaster Rovers after starring in the 2012/13 season, and ended his career with Indian Super League club ATK.(Photo by Nathan Stirk/Getty Images).
Photo: Nathan Stirk
3. Bought: Ched Evans from Manchester City
The ex-Wales international is now on the book of Fleetwood Town, after impressing with 18 goals on loan for the Fishermen last season. (Photo by James Chance/Getty Images)
Photo: James Chance
4. Sold: Matthew Kilgallon to Sunderland
Kilgallon spent four seasons with the Black Cats, and went on to impress for Bradford City. He's now a free agent after leaving Hamilton Athletic at the end of last season. (Photo by Pete Norton/Getty Images)
Photo: Pete Norton