If you are on a tight budget, your best bet is this MCM Zip Pouch. It's a popular product, while not very expensive. Another nice option is this Bric's Briefcase. While the price is rather reasonable, be sure that this product will become a great addition to your wardrobe. Or you can opt for this Frye Briefcase. This item has all the potential to become a powerful player in your wardrobe.
For something in the middle of the price range, opt for this Shinola Tote Bag. While the price is very reasonable, this product is an easy wardrobe update. In this price range, you can also check out this Saint Laurent Zip Pouch. It's an attractive option both price and quality-wise. Look at this MCM Zip Pouch too! Great value for your money.