This kind of statement is made so often now that it's almost as if people are starting to believe that it's true.
They may not want 1000 sites in their index selling the same shirt with the same description, but unfortunately in order to qualify as a search engine, they need to.
How annoyed would you be with Google if you were looking to buy this particular shirt, you search on Google, and they present you with one cherry-picked, "original" result? You click it and discover that they are asking $900 for it, they don't ship to your area, and they are currently out of stock. I guess you are just out of luck. Or else you need to find yourself a real search engine that presents you with all of the options, ranked by percieved relevancy. Even Google aren't this dumb.