the duke here is right, usualy when something is returned and they sell you an open box, even at a discount, you get the feeling that the person who returned it might have had a good reason to and you´re getting a defective product,
then you have to look at it from the store and manufacturer point of view,
if returned to the store, i cant sell it at full price, i have to slash the price as a "open box" offer,
and the manufacturer, a product returned, defective or not, cant leave the factory or the testing facility without being retested in quality control and repackaged, sometimes replacing parts or accesories to return the product to "new" status,
BUT,
last time i checked, the store has to specify if the product is non returnable, some audio and electronics retailers have a non return policy on headphones due to hygine reasons, afterall, canalphones and IEM´s go in to your ear canal, pick up dirt and wax, so if they get sent back, they have to be sterialized, becuase if i buy a pair of headphones from a store, and they give me a ear infection or some other condition that might put my hearing at risk, i´ll be sure to contact a lawyer, the store has to cover itself legaly, becuase if they sell you a product that harms your health without proper warning, they are opening themselfs to legal action.