I recall visiting my home town and went to my old barber for a hair cut - admittedly, 20+ years ago - he charged me a quid. Admittedly, it was just a buzz-cut - probably took him all of three minutes. But still.
Conversely, I was without clipper for awhile here in France, and was charged 30 euro at one place for a buzz-cut. Yeah, she washed my hair (not that it needed it), and put on some fancy oil on my head when done, but I would have preferred a no-nonsense, 3-minute and - allowing for inflation - 3 euro haircut.