Hi Lee,
Just curious, you say you put prices on your leaflets, but how do you accurately price a house up as they all vary in sizes / amount of windows etc etc 
Regards 
same for us....alot of our work is in rural areas...its just impossible to quote before looking
but i can say it would work in housing estates etc
if you search pryors crawley in google you will find his website
pretty simple pricing...i can honestly say that if i were a customer looking..it would sway me, as i can see a price before i phone up...and if im phoning...then ive made my mind up already
i guess its easier to quote wfp without veiwing...as dificulty getting to windows is far less than ladders
also...flat glass..squares...leads...it doesnt matter like it would traditional