We have recently picked up a dozen or more houses from a window cleaner, he was charging £3.00 per house, we charge £12.00.
However after the initial shock ALL the customers are now delighted with our work as the previous cleaner was your stereo-typical portrayal of a cowboy, turned up when he wanted, often every week or never, missed windows but still charged, obviously lived on a ship with portholes, etc, etc.
We don't overprice by any means, but if you provide a regular, quality service then people will willingly pay for it.
I have just priced up a hotel that were paying £75 for insides and out, at £200, awaiting to see if we get that.
Also had another 4 storey hotel that were paying £350 for insides and out (guy was using harness and anchor points for top floors) We now charge £350 for outsides only using 60' pole. But this means they can do away with their anchorage point testing (£600 a time)