Years ago I was into collecting Winchester Model 70's. If it has Winchester or Parker on the side many sound minds seem to loose touch with reality. My collection, not the largest by any means, increased more than I ever dreamed it would. I was lucky enough to find several very rare Model 70's in good to excellent condition. Best of all I remained under the radar and almost no one in the collecting field knew who I was or what I was after. Remain anonymous and the price often does not rise extra because people know you want and need their guns. Think of the term "rich collector" and you think about raising your prices right away. Problem is that I was never a real rich, "rich collector". When I sold the collection I netted enough to buy a new house.
I do not see any doubles with the potential to make real extraordinary gains in the short term. If you are after a long term gain buy land not guns. Larger parcels of undeveloped land will become increasing rare and hence more in demand over the next several decades. Guns I am afraid will fall further out of favor as our PC society deems shooting of all kind to be less correct behavior. As we old farts die and are replaced by fewer and fewer double gun enthusiast demand will decrease over time.
