If you don’t want to splurge, your best bet is this Reclaimed Vintage Rucksack. It's a terrific product, while not very pricey. Another strong contender for your wardrobe is this Babiators Rucksack. While the price of this product is rather reasonable, it will certainly attract a lot of attention. You might also want to consider this Herschel Backpack. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for an item in the middle of the price range, we've got your back with this Moschino Backpack. This piece is bound to become a total wardrobe staple. It's also worth looking at this MCM Backpack. This product is ultra popular and, just as importantly, not too pricey. And do check out this MM6 MAISON MARGIELA Rucksack! It's a very popular item and good value for money.