A tip for people who are fed up with overpriced houses. There aren't very many of them around, but some properties for sale are part exchanged with house builders. These are by far the most realistically priced properties I can find on the market without putting a ton of effort into it. If you see a property listed with two or three agents, sometimes that's because it's a builders part exchange, but the EA's failed to put that in the advert. The builder just wants to house sold, and quickly, to get it over with.
I put 'part exchange' into Rightmove for a county, with the following results:
Asking 200, Zoopla (median, always median) 212
Asking 280, Zoopla 278
Asking 280, Zoopla 292
Asking 280, Zoopla 312
Asking 240, Zoopla 377 (originally listed in June for 250k, it looks to be to be an energy money pit, or sometimes Zoopla's just crap if not many houses in the area have been sold lately)
For most of the adverts I found, they put the entire full address including house number/name and postcode in them, so people don't have to faff around trying to figure out which house it is to check the actual value.
MAKE SURE YOU CLICK TO EXCLUDE NEW BUILDS!
I hope this helps someone.