If you're looking for an affordable item, your best bet is this BaubleBar Necklace. It's a wonderful product, while not very pricey. Another wonderful option is this Shourouk Necklace. While the price is not very high, be sure that this item will become a wonderful addition to your wardrobe. You may also want to look at this LuLu*s Choker Necklace. This item is not expensive either, but it will make a difference in your wardrobe.
If you're a bargain hunter, look no further than this Goti Necklace. This item won't break the bank, but definitely deserves a place in your wardrobe.