By Aaron Smith @AaronSmithCNN December 22, 2014: 5:29 PM ET
Pepperbox
12 of 20
Sale price: $1,560
This pepperbox is an early prototype of the revolver, and it bears little resemble to the guns of today. Modern revolvers have bullets loaded into cylinders, which rotate after each shot, lining up a fresh bullet with the barrel. With this pepperbox, the entire barrel is rotated with each shot ... eight barrels, actually, each one loaded with a bullet. Ponderous it may seem, but it's better than a single-shot.