It's actually £110 - $170 around.
That covers for colour TV licence per house (as many TV as you like), B&W licence is cheaper. This is because BBC is a Commerical Free channel (apart ads for their own shows), when the program is 1 hour long, you get 57mins of viewing time, without ad breaks at all, even films run all the way through.
It not only TV, if you have a TV card in your PC, you'll need the licence, getting caught can get you a $1500 fine. And arguing you don't watch BBC channels doesn't work.
You even have to buy one for your room in Dorms in College, although I didn't buy one, and just hide my 14" TV in the cupboard when they came round. They can't search the place and we can actually deny them access onto the building. And when they did turn up, I could always ignore their knock on the door.