If you're not planning on spending much, consider buying this Kate Spade Backpack. It's a popular product for a good price. Another strong contender for your wardrobe is this Nine West Backpack. While the price of this piece is not very high, it will definitely attract a lot of attention. You might also want to consider this JanSport Backpack. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a happy medium, we recommend looking at this DKNY Backpack. While the price is very reasonable, this item is an easy wardrobe update. Also consider this MICHAEL Michael Kors Backpack. It's an attractive option both price and quality-wise.