Before heading to Amazon.com or the nearest Deb's, you should carefully consider what different prom dress vendors offer in terms of budget, quality and value-added services like tailoring, care and handling. Just because a dress looks good in an image doesn't guarantee it will look good in person. Similarly, dresses bought from the mall at a bargain basement price aren't likely to come with tailoring services, and cheap materials can reveal flaws once they're brought home.