Pricing is all about what you are happy with for a days wage , some might be happy with £100 others want £500 both are achievable depending where in the country you are and the type of work you do , however where I think a problem arises is when the cheaper ones give a quote £100 per day , someone else then quotes much higher the customer then thinks that the higher priced person is trying to rip them off and that's not the case , this is how under cutting someone else's prices can come about accidentally, those who are happy with lower earnings per day that's fine but I think they are under valuing themselves by doing so , that's if they are doing the job properly . I do a lot of work for a large firm that own blocks of flats that are retirement complexes , they had a national company cleaning there windows they used tap water only did some windows and would not do the internal communal windows unless the manager walked round with them to make sure they did the job properly , they were charging £100 per complex , totally unrealistic price , I now do a number of thease properties charging many times more than the previous firm and they are happy to pay it beacause we do the job properly and don't have to be checked up on , this isn't boasting but I have found that many cheap firms do not do the job properly as the only reason they got the job was on a cheap price then when they get it they cannot spend the time on it that it require to do it properly so they cut corners . Ime not suggesting that ones on hear are like that this was a large national firm based in Yorkshire , all you sole traders don't undersell your selves charge a decent price for a quality job