Black Caps by adidas
If you're after a thrifty option, your best bet is this adidas Baseball Cap. It's a popular item, while not very expensive. In this price range, you can also consider this adidas Baseball Cap. It's also a popular item and won't break the bank.
If you're a bargain hunter, check out this adidas Cap. While the price is very reasonable, this item is an easy wardrobe update.