Cheap school bag for teenage girl?

For the 5 years I've been at high school, I have always bought my schoolbag from M&S. They do really nice patent ones, which normally cost about �25, but they last me a whole year at school. You could buy one from primark for 1/4 of the cost, but it'll break in super-fast time, and you'll probably find that loads of other people have it. Happy Shopping! x