Yes on the xbox 360 and probably ps3 as well, put item on mannequin, remove, exit building, re-enter building, and it should have duplicated it. I did this with the ebony mail (Awesome daedric artifact) and thedark brotherhood armor. there is one later in the dark brotherhood quest, once you go to the secoond sanctuary.
Also you said you didn't have a house, well here's how to get a free one; Get the right to buy one by 1.helping the jarl. 2.save 3. talk to the steward and go through as if you were going to buy it, but once you say you want one he'll start talking, exit conversation, and sprint to a chest/cupboard etc. put all your money in it before you hear the coin giving noise, then retrieve your money after he finishes talking, also works with house expansions or additions, whichever you call them