Young, English and very good. Trafford has just gone for £30m. I’m sure Ipswich spent over £10m on Muric when they went up and he was useless.
Trafford isn't a great comparison really - and he went for £27m + add-ons but yeah. He's a regular English U21 international and now England squad player with prior experience in playing PL football, is younger and he was wanted by several PL clubs.
No, Ipswich spent £8m on Muric according to the Athletic, plus minor add-ons. I think a large part of that fee being inflated was because Man City had a fairly sizeable sell-on clause inserted in his contract.
Goalkeepers traditionally don't go for much. If you look at some of the ones in the PL. Easily over half of those starting would've cost less than the apparent £20m price tag on Rushworth's head put forward by the OP.
No one is paying that for a player which hasn't played a minute of PL football, or top flight football in Europe.
And on the topic of English goalkeepers. Even Dean Henderson didn't go for £20m. His fee was £15m + £5m add ons.