If you're a thrifty spender, your best bet is this Cropped Top. It's a popular product, while not very pricey. In this price range, you can also take a look at this Forever 21 Cropped Top. It's also a popular item and won't break the bank. You might also want to consider this Leith Cropped Top. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, consider buying this Palmer Harding Cropped Top. While the price is very reasonable, this piece is an easy wardrobe update.