levy a flat or scaling fee to allow players to, "re-package," their items so they can sell things that have been previously worn.
i'm actually not sure how this would work out in practice. there would be a large scale flooding of items onto the market, but you could make the cost prohibitively expensive and just go back and forth on this debate all day long.
i suppose what i'd really like is a logical discussion for both pros and cons and if this idea potentially has merit; and if it has major pitfalls, how they could be worked around.