As a firearms collector, I'm always looking out for firearms of a type employed in historical events. Getting the actual firearm used in a historical event is for far better-heeled, or luckier, collectors than I. But getting the same type can be doable, even at a bargain, and that's more fun to because then I can shoot the weapons.
Take this example. Slide-action rifles are not terribly popular among American shooters, who tend to favor the accuracy and durability of bolt rifles for hunting and semi-automatic rifles for other shooting sports. So even though there aren't many Remington Gamemasters around, prices on them tend to be low. My interest in them? Well, I find slide action rifles interesting, and also, a Remington Gamemaster was used in a very, very famous assassination in April 1968. I know, it's a bit morbid. But history often is.
This one isn't original. It has a custom stock. But still, it interests me, and with 3 days to go on the auction, it's at $270.