£65m for anyone is a lot of money, let alone a goalkeeper.
But in Alisson Liverpool have acquired a modern great who has, just like Jurgen Klopp said upon his arrival back in October 2015, helped turn doubters into believers.
It’s been a strange season for Liverpool’s usually imperious defence.
The win over Watford was just their fourth league clean sheet and amazingly their first at Anfield in all competitions.
Alisson sat out roughly two months of that with a calf injury while Joel Matip and Dejan Lovren have both missed large chunks.
In other words it’s been disjointed, yet the Reds have won all but one of their league games and are still on course in the Champions League and League Cup too.
Against the Hornets they were far from their best.
The conditions were diabolical; it was cold, it was blustery, it was about getting the job done.
With Liverpool seemingly playing every other day over the last couple of weeks and with two games in two days on two different continents coming up, it was a results business at Anfield.
And they were indebted to Alisson on more than one occasion while the 10 players in front of him huffed and puffed.
He is such a no-nonsense goalkeeper that even when Watford did produce opportunities you felt the Brazilian would come out on top.
Twice Ismaila Sarr and Gerard Deulofeu sprung the Liverpool offside trap, twice Alisson was there to make what looked like routine saves.
Except they weren’t, they were difficult moments made to look effortless by a man who exudes serenity in almost everything he does.
That’s three successive clean sheets, the middle of which included shutting out the prolific Erling Braut Haaland in Austria in mid-week.
Liverpool fans will tell you he has cut out the flashy, heart in mouth moments like the one that got him in trouble against Leicester last season.
Alisson has now become a man who breeds efficiency and reliability, none more so on show than in the Champions League final last May.
He clutched on to everything, never needlessly punching anything away and generally handling the tensest of environments with consummate ease.
It is worth remembering Liverpool’s goalkeeping situation prior to Alisson’s arrival.
Probably best described as a circus, Simon Mignolet and Loris Karius took turns to make blunder after blunder.
Liverpool are 10 points clear and champions of Europe for many reasons, but investing in Alisson has established both a backbone and a spine currently unrivalled anywhere else.
A last line of defence to die for.