The switch is comfortably at the top of this list, and there are some surprise names below, with Barcelona being able to bank healthy transfer fees for unwanted players.
Here, Sports Mole takes a look at the club's most expensive sales of all time.
10. Nelson Semedo - £27.2m
To: Wolverhampton Wanderers
Date: September 23, 2020
Age at the time: 26
Barcelona appearances: 124
Barcelona goals: 2
Honours at Barcelona
La Liga (2): 2017-18, 2018-19
Spanish Super Cup (1): 2018
Copa del Rey (1): 2017-18
9. Cesc Fabregas - £28m
To: Chelsea
Date: June 12, 2014
Age at the time: 27
Barcelona appearances: 151
Barcelona goals: 42
Honours at Barcelona
La Liga (1): 2012-13
Spanish Super Cup (2): 2011, 2013
Copa del Rey (1): 2011-12
UEFA Super Cup (1): 2011
FIFA Club World Cup (1): 2011
8. Jasper Cillessen - £29.8m
To: Valencia
Date: June 26, 2019
Age at the time: 30
Barcelona appearances: 32
Barcelona clean sheets: 14
Honours at Barcelona
La Liga (2): 2017-18, 2018-19
Spanish Super Cup (1): 2018
Copa del Rey (2): 2016-17, 2017-18
7. Malcom - £35.3m
To: Zenit St Petersburg
Date: August 2, 2019
Age at the time: 22
Barcelona appearances: 24
Barcelona goals: 4
Honours at Barcelona
La Liga (1): 2018-19
6. Paulinho - £35.7m
To: Guangzhou Evergrande
Date: January 4, 2019
Age at the time: 30
Barcelona appearances: 49
Barcelona goals: 9
Honours at Barcelona
La Liga (1): 2017-18
Copa del Rey (1): 2017-18
5. Alexis Sanchez - £36.2m
To: Arsenal
Date: July 10, 2014
Age at the time: 25
Barcelona appearances: 141
Barcelona goals: 47
Honours at Barcelona
La Liga (1): 2012-13
Spanish Super Cup (2): 2011, 2013
Copa del Rey (1): 2011-12
UEFA Super Cup (1): 2011
FIFA Club World Cup (1): 2011
4. Ousmane Dembele - £42.6m
To: Paris Saint-Germain
Date: August 12, 2023
Age at the time: 26
Barcelona appearances: 185
Barcelona goals: 40
Honours at Barcelona
La Liga (3): 2017-18, 2018-19, 2022-23
Spanish Super Cup (2): 2018, 2023
Copa del Rey (2): 2017-18, 2020-21
3. Luis Figo - £51.1m
To: Real Madrid
Date: July 24, 2000
Age at the time: 27
Barcelona appearances: 249
Barcelona goals: 45
Honours at Barcelona
La Liga (2): 2000-01, 2002-03
Spanish Super Cup (2): 2001, 2003
UEFA Champions League (1): 2001-02
UEFA Super Cup (1): 2002
Intercontinental Cup (1): 2002
2. Arthur - £68.6m
To: Juventus
Date: June 29, 2020
Age at the time: 23
Barcelona appearances: 72
Barcelona goals: 4
Honours at Barcelona
La Liga (1): 2018-19
Spanish Super Cup (1): 2018
1. Neymar - £188.9m
To: Paris Saint-Germain
Date: August 3, 2017
Age at the time: 25
Barcelona appearances: 186
Barcelona goals: 105
Honours at Barcelona
La Liga (2): 2014-15, 2015-16
Spanish Super Cup (1): 2013
UEFA Champions League (1): 2014-15
FIFA Club World Cup (1): 2015
Copa del Rey (3): 2014-15, 2015-16, 2016-17
Monaco 
Stade Brestois 29 
Bordeaux 
Nimes 
Bayern Munich 
FC Augsburg 
Paris Saint Germain 
Toulouse 
CSKA Moscow 
FC Rostov 
Leicester 
Chelsea 
Valencia 
Betis 
Dynamo Kyiv 
Chornomorets Odesa 
Verona 
Inter 
Bayer Leverkusen 
FC Heidenheim 
Borussia Dortmund 
SC Freiburg 
VFL Wolfsburg 
Union Berlin 
Arsenal 
Nottingham Forest 
Everton 
Brentford 
Spartak Moscow 
Lokomotiv Moscow 
Rangers 
Dundee Utd 
Atletico Madrid 
Alaves 
Lens 
Marseille 
Ingulets Petrove 
Shakhtar Donetsk 
AC Milan 
Juventus 
ST Malo 
Manchester City 
Tottenham 
Eintracht Frankfurt 
Werder Bremen 
Girona 
Espanyol 
Feyenoord 
Heerenveen 
ST Etienne 
Montpellier 
Grenoble Foot 38 
Heart Of Midlothian 
Celtic 
Reims 
Lyon 
PSV 
Groningen