There is so much work out there where the punter will pay top dollar for a good job.
When i started just over a year ago, the best advice i had was "Minimum £10"
Yesterday i was asked to quote on a largish semi where the old w/c charged £18 in and outsides!
I quoted £20 outsides only, and got the job.
My minimum has crept up to £12 now, and people are happy to pay it as they get a good job!
A window cleaner in the area where i live does 3 bed semis £3.50 2 weekly, i was asked by one of his customers to quote, i quoted £10, but said i would only take on if she got some of her neighbours as well, dont get me wrong, im not after the fellas work, but if they are prepared to pay double, then that spks for itself. Yesterday i had a call from the lady, she has 2 others who want me to clean!!!
The reason they want to change is
1/ There is a different cleaner every time.
2/ The frames and cills are NEVER cleaned
3/ They like my professional approach

It doesnt bother me at all if there are £2.50 merchants out there, cos 1/2 there customers want to get rid of them any way, so theres always a new customer around the corner.
In a year i have built up a business with 265 customers who pay top dollar, and i know that if they were approached by a £2.50 w/c, they wouldnt leave!!
Welcome them, cos they are getting your future customers ready for you!!
Oh and by the way...i live "Up Norf"...lol