If you're in a thrifty mode, your best bet is this Button-Down Shirt. It's a popular piece, while not very expensive. In this price range, you can also check out this Uniqlo Button-Down Shirt. It's also a popular item and won't break the bank. You may also want to look at this Long Sleeve Shirt. This item is not expensive either, but it will make a difference in your wardrobe.