Eightbore is right. While I did make money when I sold my Winchester Model 70 collection, enough to pay for this house, the entire profit was from buying right and getting solid guns not refinished guns pretending to be factory original. That field has matured as they say and I would not be able to do it again. If you buy at fair market value you will struggle to keep up with inflation much less make a real return.
I could have made more money if I had bought the "right" stocks, couldn't we all, but picking them out is a problem. With global warming I have been thinking about investing in polar ice and ice bergs. Al Gore says it is a hot field to get into now.