I would originally say area, but in one area I work I could not charge the price that others were doing. My selling tool was the licence and insurance etc.. which worked a treat, people were then prepared to pay double.
How folk can run a business on low prices begs belief, just look at the price of petrol in the last few years. Price of food, house prices etc... and we still want to stick with prices that are 10 yrs out of date.
House like 3 bed det I would say £8.00 min.