The only time I will drop my price is if im putting new linings or casings in. Then I might go to about £60. The market dictates what the price is. Lots of punters dont like paying cheap prices. They appreciate that if you charge a high price you'll produce a quality job. Also I dont take a penny until the last screw goes in and I have never had a non payer. If you charge 20-30 a door you'll always have work sure but what you are doing is undervaluing yourself in my opinion.