I do not believe it is wrong, it is about supply and demand. If people are willing to pay for an unused code (demand) and you have a legitimate code (supply) which you can make a few extra dollars, why not. The bad thing with selling codes on ebay is if your buyer states the code does not work or they already had that dlc. It becomes a nightmare since ebay does not protect buyers on virtual items. I even had the hardcopy to mail to the user but ebay stated it was still not protected since it was a virtual item. Please note, I only email the codes unless the buyer wants to pay postage. My success rate emailing dlc on ebay has been 99%.