Watch Antiques Roadshow on PBS. The furniture that retains and/or appreciates in value is furniture that is made of solid wood, such as mahogany, walnut or maple with solid secondary wood such as maple, poplar or even white pine. There is no flake board, plywood or plastic.
Things that are built of quality material, well made. What guns meet these critera? Plastic, alloy, even painted finishes rule the day.
That is not to say these arms are inferior, on the contrary, they are very reliable, accurate and fine guns. Just lack the trademarks of quality.