Its written into our contracts that we should return old uniform. However, in practice, no-one does this as the airline doesn't want it back!! This is uniform that the airline paid for. I think somewhere in the company info it says that as long as it is "de-identified" then you can do what you like with it. In practice, as long as there are no specific airline identiers on it then you could do what you like - ebay, fancy dress shop, whatever.