They did get him at a discount price.

I am sure he will be asking for double that amount next season for them to keep him or he is off to a team that will pay him this much.
Because he has the top scoring title from this time onward until Kane comes back onto the pitch.
No games this week and all these games(the ones which were postponed due to weather conditions not being ideal to travel to the games) will resume next month from what they released yesterday on the EPL website.
Taking into account current marketing and TV payouts in EPL, I think Liverpool will able to find money for not repeating the mistake with Coutinho. If they are ready to spend nearly 80 mln for van Dijk and 65 mln for Naby Keita, it means Klopp and bosses want to build a long-year project with the highest goals. So a big part of the business will depend on Salah's decision - if he believes in prospects of Liverpool's future, it should be enough money for him to be satisfied. If he doesn't believe, it will be something like the situation with Coutinho, when there is no point to keep an unmotivated player in a team.
Just my own opinion.
Yes. All I ask is to not let him be wasted just like Arsenal did with Ashley Cole years back. Remember that season they went undefeated in the season? Cole could of stayed but they did not offer him enough so he packed his bags and went to where the money was in Chelsea. Even though he didn't want to, it was all because he didn't feel his abilities were being appreciated there with the pay they were offering him. Mo Sallah will feel the same way if he is the top scorer at the end of the season and they do not budget him for his talents.