I don't believe anything about Brexit causing lower house prices, it's an excuse used by estate agents to get you to drop the price a bit, making it easier for them to sell.Having bought and sold a lot of houses, agents are always looking for a way to do this as it makes their lives easier.Obviously, if there is high demand in a certain area then a house will always sell without much effort on your part, but where there is plenty on offer, you have to dress the house to make it look inviting, and clear out a lot of personal stuff.
We never bothered to do this years ago ( or expected anyone else to) but it's the done thing now.