Celtic have seen numerous players leave the Parkhead club for significant amounts of money over the years such as Odsonne Edouard, Kieran Tierney and Moussa Dembele among others.
One other player that the Hoops managed to make a profit on is Tony Watt.
Having joined the club’s U20 side from Airdrie United back in 2011, the striker was sold to Belgian club Standard Liege in the 2014 summer transfer window for a fee of £1.35m according to Transfermarkt.
During his time at the Parkhead club, the Scotsman made just 34 appearances in a Celtic shirt, scoring eight goals and delivering five assists in the process.
One of the goals Watt scored came during Celtic’s infamous 2-1 victory over Barcelona in the Champions League back in 2012.
The 28-year-old only spent a few months with Liege before then having spells with numerous clubs in England, Scotland, Belgium and Russia.
This shows how much his transfer value has plummeted since leaving Celtic, who certainly pulled a blinder by cashing in on him when they did.
Since joining United, Watt has scored only once in 14 appearances across all competitions.
To highlight just how disappointing the centre-forward has been for his current club in front of goal, only four of the 13 shots at goal he’s had in the league have been on target.
Having described himself as being like a “villain” when he celebrated his goal against Motherwell back in February, the former Hoops figure also admitted to being “selfish” for moving to United in the first place.
Taking into account how Celtic have scored more goals (78) in the SPFL this season than Motherwell (38) and United (31) combined, it doesn’t seem likely that many Hoops fans will have been hoping that their club had kept hold of the well-travelled attacker.
With all of this in mind, this is a prime example of Celtic making the right decision when it comes to cashing in on one of their key players and moving on without them.