In the summer I viewed a property which is on at £600k. It was bought 20 years ago for £250k. It's very niche as it is an equestrian property i.e. it has grazing land and stables. Owners had it on the market a couple of years ago then took it off before relisting last summer. It's still on at the same price. Owners want to downsize as they are empty nesters and no longer have horses.
It would probably be worth £600k except that it will be hugely affected by HS2 if it goes ahead. Given that, I wouldn't be prepared to pay more than £500k but would probably go in at £400k to start. Is that too cheeky? It needs some work but nothing that couldn't be done over time.