There was a superb interview with Paul Heaton in the Guardian recently where he said he’d pegged the prices for his arena tour at £35. It can be done, but there are not many like him around. I’ve just had a look on Ticketmaster and the few that are left seem to be £35 - £45 which I assume includes some add ons he can’t control.
Not a fan but good for him. I remember the first time I thought "ouch" when paying for an arena gig ticket: U2 in 2001 on the Elevation tour, £45 at London Earls Court (= £82 now). Just over 20 years later, £45 seems a very 'reasonable' top-price arena ticket. Even at £82 it would be notable for not being three figures.
Radiohead persisted in keeping their prices low for such a high-profile band, but that ended and it went up but when they last toured about 6 years ago it still didn't reach the levels we saw with eg Genesis, PG etc.
Not a music example: highly regarded stand-up performer/storyteller Daniel Kitson never charges more than £15 regardless of venue but then he generally seems to perform at independent places not under the giant grabbing iron hand of ticketmaster.