Before beginning to look for the perfect cocktail dress, realize that there is a triangle of important qualities for finding a dress: appearance, cost, and time. The more you value one of these, the more you will likely need to sacrifice the others. In all stores, you should start with checking the clearance section first, in case you find something that works. As you go along, pick the first dress that meets all your criteria, as it will almost assuredly be the cheapest option.
Where to find the right and affordable cocktail dresses? There are so many places you can find this type of dress, of course, there are still many online stores selling cocktail dresses, such as Sposadress.com, one of the most reliable online shop.