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.
5. Kyogo Furuhashi - £4.5million
What a steal. One of Ange Postecoglou's first signings as Celtic manager, Kyogo has been a a magnificent signing for the club and a bargain at the price. | SNS Group
6. Olivier Ntcham - £4.5million
The former Manchester City midfielder completed a permanent move to Glasgow's East End after impressing on loan the season prior. He ended up playing 146 times for the club, winning three Scottish Premiership titles, three Scottish League Cups and two Scottish Cups before departing for Swansea City. Now playing in Turkey for Samsunspor. | SNS Group
7. Joos Valgaeren - £4.8million
One of Martin O'Neill's first signings at Celtic Park, Valgaeren cost almost a reported £5million when he joined from Roda JC. Scored two memorable goals against Juventus and Rangers, won three Scottish Premiership titles, three Scottish Cups and one Scottish League Cup before leaving for Club Brugge in 2005. “I played five years for a beautiful club, so it is now in my blood. I am a supporter, if only from a distance" said the Belgian when reflecting on his time in the green and white hoops. | SNS Group 0141 221 3602
8. Rafael Scheidt - £4.8million
One of the worst signings in Celtic's history, there's no denying the Brazilian was one big expensive mistake. Played just five times, was plagued with injury and named 'the second worst transfer in the history of football' by The Guardian. | SNS Group 0141 221 3602