On average, about $15-$30 for a haircut, but I generally only get a trim as I have kept my hair long for about the last 14 years. I last bobbed my hair about 15 years ago.
I have paid as much as $200 for highlights/cut/style, and the most I ever paid for a hair service was $250 (not including the hair I had to buy) when I got long extensions put in (about 10 years ago). It was actually a deal because my regular hair girl was just starting out doing them and I was one of her guinea pigs, it was a 3-4 hour process. NEVER AGAIN. She did a good job, but it's too high freakin maintenance.
Now, and for the last 3 years or so, I have been going to D'Jay at Visions, and for about $85 on average (not including tip) I get highlights/cut/style, and she does an excellent job. That is a great deal.