Black Scarves from Asos
if you're in a thrifty mood, consider this Asos Scarf. It's a popular piece for a good price. Also take a look at this Monki Scarf. It's an item you're bound to love which also doesn't cost the earth. Or you can choose this Johnstons of Elgin Scarf - be sure you'll be making a stylish addition to your wardrobe.
For something in the middle of the price range, look at this Ted Baker Scarf. While the price is very reasonable, this item is an easy wardrobe update.