I sometimes wonder if the growing energy crunch coupled with the growing resurgence in "muscle cars" might not bring about a situation similar to the early 1970's. These wicked new Camaro, Challenger, etc designs are about to hit the market just as gas prices are shooting out of sight. I can't imagine they'll be selling like hotcakes. For the few that do, maybe in 15 years when gas drops back to an affordable level, those who bought the big horsepower, all options models might have something collectable & desirable on their hands. As it is, I think we have at least a decade of underpowered "roller skate" type designs to look forward too.
Machineguns (in the US) have been a pretty good investment since the early 1990's, if you're into that kind of stuff. Unlike the warbird market though, it's an artificial prohibition on "new-production for the civilian market" (enacted in 1986) that's created the lopsided supply & demand dynamic for machineguns. It would only take the stroke of a pen by Congress to turn a $13,000 German MP-40 into a $1500 collectible. That said, I doubt such a thing will ever happen anytime soon.
I think when the war calms down and the market is flooded with suplus troops carriers and other vehicles, putting a couple back as a 30-year investment might not be unwise. Society will be bored to death with the image of such hardware and the hard memories they represent, and there will be surplus yards filled with the big monstrosities - many of which will be large, hard to transport, and have little commercial value. Most will be scrapped or recycled, but if you did your homework and singled out specific vehicles that were assigned to particular units that saw combat, it might be worth the trouble in the long run. Once society's shock and anxiety toward the conflict fades in a couple of decades, owning a true touchstone of a particular battle would be a valuable proposition IMO.
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Rob Mears
'Surviving Corsairs' Historian
robcmears@yahoo.comhttp://www.robmears.com