There's a rather stark difference in the formal wear you'd style for summer gatherings versus fall functions. To prepare for weddings, parties and other events you have on the calendar, you have to check out the flattering cocktail dresses available on Amazon - yes, really! To sweeten the deal, we focused on dresses that are under $50. This list is proof that you can snag a new elevated dress at a great price . . . so you're not wearing the same one over and over. Cocktail dresses typically go to the knee or past it, but we threw in varying lengths so you could find one you love.