If you're looking for a thrifty option, this Bow-tie will fit the bill. It's a popular choice, while not very pricey. Another strong contender for your wardrobe is this Tonello Bow-tie. While the price of this item is competitive, it will certainly attract a lot of attention.
If you're after a bargain, look no further than this John Richmond Bow-tie. This item doesn't cost the earth, but absolutely invaluable in your wardrobe.