No one got ripped off.
He was told how much it would be and paid for it. Where's the rip-off here?
OK I think he is silly to pay that amount but he went in eyes wide open and just paid the first asking price.
How many posts do you see on here about amazingly high prices for window cleaning paid by customers. I see very few turning it down when they can get away with it.
I get the highest price I can for my services. Sometimes I get a right good result and happily pocket the money. As do many others around here from what I can see. It's business. Not a rip-off.