If you're a thrifty shopper, your best bet is this Beanie. It's a fantastic item, while not very expensive. Another strong contender for your wardrobe is this Maison Scotch Hat. While the price of this item is competitive, it will definitely attract a lot of attention. You might also want to consider this Wooden Ships Knitted Hat. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're looking for a happy medium, we've got your back with this Grevi Beanie. This product is likely to become a total wardrobe staple. You can also check out this Beanie Hat. It's an attractive option both price and quality-wise.