I think Son is on £190,000 pw. I doubt we'll be spending that on a replacement when he leaves.
Richarlison and Solanke are on about £90,000 pw, which I assume is what we'll pay for a new attacker as in someone that is already established in the game that our leaders think is good. I doubt we'd pay £150.000 per week as you stated for Liverpool.
We normally double a players wage from their previous club when we sign them so I guess it depends on who we sign really and what kind of profile they are.