I'd sell him in a heartbeat if it was around £50m and we were guaranteed to bring in two genuinely quality players with the money.
Having a world class goalkeeper isn't as important as having a steady goalkeeper plus two better starting XI players than we currently have (what could be achievable if we sold Pickford for a tidy sum). Especially when you're Everton and the height of your ambitions is to simply remain in the division.
Alas, with the clowns in charge of the decisions at Everton, that money would be well and truly wasted, so we really have to keep him at all costs.
That said, I can see him joining Tottenham in the summer or in 18 months time once Lloris' contract is up (in June 2024).