I live in the Midlands. Have been househunting for 2 years. Estate Agent recently told me to 'ignore asking prices'. As they have seen offers of up to 100k below asking being accepted. They told me to view and bid on houses within 100k of my budget.
I personally know of two houses sales in my area - 3 bed asking 295k, after a year 225k was accepted. A 4 bed asking 295k - 200k was accepted.
However, some sellers are unrealistic.
Do your research.
If you don't already live in your chosen area, rent there for a year and househunt from there. Then you can get to know neighbours, estate agents, which estates, schools etc are good.