Formal Cocktail Dresses Under 50 Dollars Inexpensive Red And/or Black Dress?

Inexpensive red and/or black dress? - formal cocktail dresses under 50 dollars

I'm happy for red and / or the black dress, knee length.
Not for the party, but not elegant or casual. A bit like semi-formal. Perhaps something like a cocktail dress.

Here are some links to give an idea of my style:
Http: / / www.forever21.com/product.asp?catalog% 5Fname = &% forever21 Category 5Fdressy% 5Fname = dress & product% 5Fid = 2059951212 & page = all
Http: / / www.forever21.com/product.asp?catalog% 5Fname = &% forever21 Category 5Fdressy% 5Fname = dress & product% 5Fid = 2056245687 & page = all

I'm looking for something under $ 50. Thank you.