If you're a frugal shopper, you'll appreciate this Corsia Backpack. It's a fail-safe choice and a great investment. Also consider this Piquadro Rucksack. It's a product you'll fall in love with which also doesn't cost too much. You may also want to look at this Parentesi Backpack. This item is not expensive either, but it will make a difference in your wardrobe.
If you're a bargain hunter, you're in luck with this Frye Backpack in stock and waiting for you. You are guaranteed to fall in love with this item. Also consider this Piquadro Backpack. It's an attractive option both price and quality-wise. Look at this Backpack too! Great value for your money.
If you're looking at it like an investment piece, why not opt for this Prada Rucksack - a great luxury choice.