You wait years for the world transfer record to be broken for a goalkeeper, and then it happens three times inside 14 months.
It is perhaps a sign of the times in the transfer market as fees for players continue to escalate to dizzying proportions with Chelsea set to complete a £72million move for Kepa Arrizabalaga.
The Blues have already paid the Athletic Bilbao stopper's release clause in full and that will also pave the way for Thibaut Courtois' departure to Real Madrid from Stamford Bridge.
Ederson's arrival at Manchester City in 2017 broke a 16-year record fee for a goalkeeper, only for that to be beaten a little over a year later when Liverpool almost doubled that fee to bring in Alisson.
But rather than proving the exception, Liverpool may have just started a new trend for hyper fees for goalkeepers following Chelsea's move to break the Alisson record less than a month after it was set.
Sportsmail looks at how the world record fee has progressed over the years from Phil Parkes' move to West Ham all the way through to this summer.
Phil Parkes £565,000 (QPR to West Ham — 1979)
West Ham paid a world record fee of £565,000 to sign Phil Parkes from Queens Park Rangers in 1979.
Manchester United launched several bids to sign Parkes as Red Devils boss Dave Sexton was keen on sealing a reunion with the custodian following their time together at QPR. The west London outfit fended off interest from Manchester United before eventually accepting West Ham's then-world record offer.
Andoni Zubizarreta £1.7m (Athletic Bilbao to Barcelona – 1986)
Andoni Zubizarreta became the most expensive goalkeeper in the world in 1986 with his move to Barcelona, where he would spend nearly a decade as first choice.
He was a crucial part of Barcelona's success as the club won four consecutive La Liga titles from 1991 to 1994, as well as European success in the 1991-92 season. His affiliation with Barcelona would be long-standing, with Zubizarreta director of football at the club between 2010 and 2015.
Luca Marchegiani £6m (Torino to Lazio – 1993)
After five successful years at Torino, Luca Marchegiani was bought by Lazio for a record £6m in 1993, and would go on to spend a decade at his new club.
He had success as well as longevity at Lazio, winning Serie A in the 1999-2000 season as well as several other domestic cup triumphs and established himself as one of the most impressive goalkeepers in Italy during the 1990s.
Gianluca Pagliuca £7m (Sampdoria to Inter – 1994)
Gianluca Pagliuca became the most expensive goalkeeper of all-time in 1994 when he moved to Inter from Sampdoria to Inter in 1994, where he would spend five years at the club.
During his time in Milan, Pagliuca won the UEFA Cup in 1998 having lost in the final the previous year, before moving to his hometown club Bologna after the signing of Angelo Peruzzi to Inter in 1999 signalled the end of Paglicua's position as first choice goalkeeper.
Angelo Peruzzi £15.7m (Inter to Lazio - 2000)
Known for his goalkeeping abilities rather than his loyalty to any one club, Angelo Peruzzi played for Italian sides such as Roma, Inter, Juventus and Lazio in his career which spanned two decades.
However, it was his move to Sven-Goran Eriksson's Lazio in 2000 that was most memorable for a then world record fee of £15.7m, a club where he would go on to make 200 appearances though perhaps remained relatively unknown internationally due to the national team dominance of Gianluigi Buffon.
Gianluigi Buffon £33m (Parma to Juventus – 2001)
Juventus smashed the world-record fee for a goalkeeper ahead of the 2001-02 season as they bought Gianluigi Buffon for £33m from Parma. Indeed, he would remain Juventus' record signing for 15 years, until the arrival of Gonzalo Higuain.
Buffon went on to justify this fee and more in his time at the club, making the second-most appearances for Juventus ever and winning 19 trophies as he cemented himself as the best goalkeeper in the world for over a decade.
Ederson £35m (Benfica to Manchester City - 2017)
Having been unimpressed first with Joe Hart and then Claudio Bravo, Pep Guardiola prepared for his second season in charge of Manchester City by spending £35m on Brazilian goalkeeper Ederson, a fee that broke the long-standing world record.
Bravo had been brought in for £17m just a year earlier, however Ederson's distribution skills and shot-stopping abilities at Benfica appeared to make him a perfect fit for Guardiola's system. This would prove to be the case as he played a crucial role in Manchester City's record breaking season as the club stormed to the Premier League title, starting in thirty-six of the league games.
Alisson £67m (Roma to Liverpool - 2018)
Having watched first choice Loris Karius literally fumble Liverpool's chances of winning the Champions League final in May, Jurgen Klopp was instantly on the look out for a replacement - targeting the Roma keeper.
When Karius made another blunder in a pre-season friendly, he effectively sealed his fate. With team-mate Simon Mignolet also not fancied by Klopp following a series of unconvincing performances, the Liverpool boss showed no hesitation to pay what he had to in trying to bring in a reliable goalkeeper.
