I recently came across a great website with super cute, inexpensive clothes - UrbanOG http://www.urbanog.com/index.html
When you're looking for bridesmaids dresses, you don't always have to look at actual bridesmaids dresses! This site has hundreds of dresses and none of them are over $50! The great thing about getting non-traditional bridesmaids dresses it that your girls will be able to wear them again!
Check out these great dresses I found on UrbanOG that can be dressed up for your bridesmaids...
(I may or may not be obsessed with mint dresses right now...)