It has rumbled on throughout the summer, but Celtic boss Brendan Rodgers finally got his man earlier this week with the arrival of Adam Idah from Norwich City.
The Republic of Ireland international was confirmed as a Hoops player on Wednesday evening, returning to the club following a stunning loan spell last season saw him score nine goals in 19 appearances - and the Celtic faithful are delighted to see their goal hero return to the East End of Glasgow.
With a transfer fee of £8.5million plus add-ons widely reported, Idah has become one of the most expensive recruits in the club’s history - but where would he place on the list of Celtic’s most expensive signings ever?
Here is the full list of Celtic’s top 20 most expensive transfers in history, from 20-1.
9. Jozo Šimunović - £5million
A big money Ronny Deila buy back 2015, the Croatian was largely a dependable performer during his time in Glasgow's East End, winning five titles. However, he was plagued by a persistent knee injury that affectively ended his time in Scotland. Currently a free agent, Šimunović played just eight games for hometown club Gorica before being released in 2022 and has been without a club ever since. | SNS Group
10. Albian Ajeti - £5million
The Swiss attacker was a big money transfer for the club in 2020, moving from English Premier League West Ham United, after struggling for game time. Despite having to battle for regular first team football, he was able to contribute six goals in his debut season for the club before falling out of favour. Recently returned to Switzerland, where he has signed for former club Basel. | SNS Group
11. Vasilis Barkas - £5million
Celtic's expensive mistakes have been few and far between in recent years, however, the Greek goalkeeper was a real error in recruitment. Costing the club a whopping £5million, he was error prone during his stint in the nets and was quickly dropped and sent on loan to FC Utrecht until his contract ran out. | Getty Images Photo: Getty Images
12. Neil Lennon - £5.75million
A very costly signing at the turn of the Millennium, Lennon was worth the fee shelled out to Leicester City. Won 11 domestic trophies as a player with Celtic, before returning as a manager and winning a further 10. | SNS Group 0141 221 3602