Juventus midfielder Paul Pogba is to undergo a medical at Manchester United ahead of a reported world-record transfer - four years after leaving Old Trafford for just £800,000.
Here, we take a look at five other players who cost a lot more the second time around.
1. Nemanja Matic
Initially cost Chelsea £1.5million from MFK Kosice, and was then swapped for mop-topped maverick Benfica defender David Luiz two years later. The Blues saw the error of their ways in 2014 when they shelled out £21 million to bring the Serbia midfielder back to Stamford Bridge.
2. Graeme Le Saux
Sold by Chelsea to Blackburn for just £700,000 after throwing his shirt at manager Ian Porterfield in protest at being substituted, Le Saux became the most expensive defender in England when the Blues forked out £5million to bring him back.
3. Dani Carvajal
The right-back had not made a single first-team appearance for Real Madrid when they sold him to Bayer Leverkusen for 5 million euro. However, the canny Spaniards inserted a buy-back clause just in case he turned out to be any good. Which he did. Carvajal returned a season later for 6.5 million euro and is now a regular among the Galacticos.
4. Bobby Zamora
Joined West Ham as an apprentice but was released as a 17-year-old along with a group of players including Paul Konchesky. Five years later the relegated Hammers brought Zamora back as part of a big-money deal which saw Jermain Defoe sold to Tottenham. Played in the 2006 FA Cup final - alongside Konchesky, who cost £1.5 million from Charlton.
5. Alan Shearer
Newcastle had a young Shearer growing up on their doorstep and offered him a trial. However, the story goes that they put him in goal. Southampton had the foresight to play Shearer up front and promptly signed the future England captain. When Newcastle finally got their man - from Blackburn, in 1996 - it cost them a then world-record £15 million.