One of my collections is Zippo lighters. I've got around 150 of them. There are about 35 that I actually use on a rotating basis. The ones I display in unused, new condition are in glass front display cases. One has all cowboy type lighters, including the John Wayne cowboy series and the other is Indian Zippos. My most recent cowboy lighter is called The Dead Gunfighter, or something like that, (I'll have to check the Zippo Click collector's web site). I has a skeleton in a Stetson and a Clint Eastwood type pancho, with a SAA in each hand. On close examination I noticed a lot of detail on it that I hadn't noticed when I first bought it. For instance, there's a crow sitting on his right shoulder and you can see cartridges in his gun belt, etc.
I've been collecting Zippos for a number of years now. It's one of the few products still made in the USA. They are guarenteed for life. They will fix or refurbish them for you free of charge. My older brother has one that he purchased back in the 1960's which he has shipped back to Zippo several times for repair and they have never charged him a cent. The Zippo Collecters club sends a key chain with a penny mounted on it which represents the "cent you'll never pay for repairs".
When I find a special one for sale I'll sometimes buy two... one for collecting and the other for using, which was the case with the dead gunfighter. The most collectable and most valuable Zippos are the ones made for companies, like the series of ones made for Marlboro and the Joe Camel ones.