11/5    Used market question (example: Speakers):
        Since speaker technology doesn't change that fast, and since
        more and more speakers are produced, will the price of used
        speakers tend to hold well?  Or will the price of used speakers
        go down because more speakers are produced (greater supply)?
        \_ It's called fucking ebay. Use it.
           \_ I was hoping for a theoretical discussion.
        \_ You also have to consider the rate at which speakers are destroyed
           and/or blown-out.