If you are on a tight budget, your best bet is this Mango Belt. It's a wonderful piece, while not very pricey. Another strong contender for your wardrobe is this Asos Waist Belt. While the price of this item is not very high, it will certainly attract a lot of attention. You may also want to look at this CTM Belt. This item is not expensive either, but it will make a difference in your wardrobe.
For something in the middle of the price range, why not consider this Ralph Lauren Belt. While the price is very reasonable, this product is an easy wardrobe update. It is also worth looking at this Belt. It's an attractive option both price and quality-wise. Alternatively, opting for this Versus Belt is a nice choice as well!