By Aaron Smith @AaronSmithCNN December 22, 2014: 5:29 PM ET
M-1 with infrared
3 of 20
Sale price: $1,800
This is a standard M-1 carbine from World War II, but fixed with an extraordinary scope from the Korean War. It is one of the earliest infrared sights in existence. But while it was cutting edge weaponry in the 1950s, its unwieldy bulk and dependence on a massive power source makes it unusable on the battlefields of today. The original stenciled carrying case is included.