If you do the job well i.e using specialist cleaning chemicals get up there on ladders clear out gutters properly,test system ,fix leaks and make sure what you cant see isnt blocked,downpipes unbelievable how many people don't bother checking.
If the jobs done well and they look almost new again,you can charge anywhere from £50 terrace to £200 large detached,
People running around doing a full and dangerous days work for £50 ,are ruining the business for me and others who do a quality service.
Charge more and do more.