If you'd rather not spend much, why not opt for this Marc Jacobs Backpack. It's a fantastic product for a reasonable price. Another strong contender for your wardrobe is this Topshop Backpack. While the price of this piece is not too high, it will surely attract a lot of attention. Or you can choose this Rip Curl Rucksack - be sure you'll be making a stylish addition to your wardrobe.
If you're looking for a happy medium, you're in luck with this Tory Burch Backpack in stock and waiting for you. You are guaranteed to love this piece. You can also look at this Kenzo Backpack. It's an attractive option both price and quality-wise.
If you're not a thrifty type, then what you're looking for is this Marni Backpack. It's more expensive but worth your money. While you're at it, also have a look at this Sacai Rucksack. Yes, this item is expensive, but it does not mean it's not worth it. Why not also take a look at this Anya Hindmarch Rucksack. You won't regret the money spent!