If you had $1200 to spend, and all you wanted to do was buy one handgun as an investment, which would it be?

The plan is, buy it, care for it, but never ever shoot it. Keep all the paperwork, etc, so that in 25 years, you sell it for an appreciated value.

What gun would you choose today, for this purpose?

Or is no gun really worth doing that with (i.e. the value of every gun would fall behind inflation - or at least fall far behind other reasonable investment vehicles).

I'm specifying NEW here, because otherwise the answers would be something like "find a gun-hating widow whose husband left behind a... blah blah blah". Well, that's not always possible to do, so we're sticking with brand new guns for this hypothetical.