One man's meat is another's poison.
It is all about the things that everyone knows and EA's work by - position/seclusion/privacy, cost of upkeep, state of the existing building, how the purchase could be financed (commutable, to where? And suchlike), retirement area, etc. etc. etc.
The Walton property - swamped with holiday-makers in season, horrendous upkeep due to being exposed, and so on. Lincolnshire - much of it not a commutable distance from anywhere and low local wages, and so on.
As for the effects of C19 it has made the news umpteen times - LOADS of people like working from home so have been looking further out, so sales have soared and prices risen.
I lived in Torbay for a while and the prices there and also around Tavistock were crazy as plenty of husbands (usually) worked in London and stayed there during the week, and had their other half, (and usually daughters) parked with 2 horses in Devon.