If you are on a tight budget, your best bet is this L'Agence Peasant Dress. It's a wonderful piece, while not very costly. Another good option is this Velvet Peasant Dress. While the price is not too high, be sure that this piece will become a worthy addition to your wardrobe. You may also want to look at this Splendid Shirtdress. This item is not expensive either, but it will make a difference in your wardrobe.
For something in the middle of the price range, consider buying this J Brand Shirtdress. While the price is very reasonable, this product is an easy wardrobe update. You can also take a look at this Derek Lam Shirtdress. It's an attractive option both price and quality-wise. Consider this Shirtdress too! Great value for your money.