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Amazon has a surprising selection of affordable formal dresses — if you know where to look.Mollie Davies/Julia Pugachevsky/Sally Kaplan/Business Insider
Shopping for clothes on Amazon can be a gamble, as you never can tell when something's going to pass the "what I ordered versus what came in the mail" test. It's helpful to read the reviews on the best dresses on Amazon, so you can set your expectations according to others' experiences.