Anything involving man hours seems to cost a mint these days.
We wanted a new window fitted in an internal door. Security glass, so that would've been probably 70 quid to start with. But the quotes were coming in at £160-200. Can't have been more than 15 minutes work: remove beading, remove bits of old glass, put new glass in, pin beading back. How can that be £100?
And just to add insult....when we did sigh and say, ok, whatever, they sent two guys (two?) round to measure the hole, then rang to increase the quote. When I asked why, they said I'd measured wrong and it was bigger than I'd said. When I asked what measurement they had, they told me, and it was out by 20cm. We had a brief discussion about this (they, unlike me, were apparently 'experts') before I confirmed that no, we would not be needing them to do the job.
Two £400/hr experts who between them can't measure a bleedin' hole. Give me strength...