If you can’t spend much, this San Diego Hat Company Scarf will fit the bill. It's a popular choice, while not very expensive. You might also want to take a look at this Nordstrom Scarf. It's a product you'll fall in love with which also doesn't cost the earth. You might also want to consider this Mango Scarf. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're after a bargain, consider buying this Ungaro Scarf. While the price is very reasonable, this item is an easy wardrobe update. It's also worth checking out this Bulgari Scarf. This product is extremely popular and, just as importantly, not too pricey. And do check out this Diane von Furstenberg Scarf! It's a very popular item and good value for money.