If you're a frugal shopper, your best bet is this Mi-pac Rucksack. It's a fantastic item, while not very pricey. Another strong contender for your wardrobe is this Asos Rucksack. While the price of this piece is not too high, it will definitely attract a lot of attention. You may also want to look at this Park Lane Rucksack. This item is not expensive either, but it will make a difference in your wardrobe.