With their "we're Liverpool FC and we're special" discount, we could probably let them have him for a mere £40m
Kelleher is no mug though. By all accounts Bazunu only plays ahead of him because he is a regular starter. If they sign someone to play ahead of him then he would surely look to leave The Liverpool-Saudi thing that has surprised me is that they don’t seem to have seriously gone in for Salah. Or been rebuffed. You’d think the Saudi league would want to sign the highest profile Muslim player out there. And up until their emergence it looked like Liverpool were going to be faced with eventually having to replace their superstar with no incoming transfer funds to do it (or at least funds from other player sales spread around the squad) If Alisson is indeed due to go then it might be time for them to entertain a full rebuild
I read somewhere he turned down Liverpool at some point in his career so I wouldn't get your hopes up.
Russell Martin has said 5 or 6 weeks ago there were players adamant they wanted to leave and they have now changed their minds.