I hoard things like Coca-Cola bottle caps, zippers, fire extinguisher pins, cork, but those things I don't buy. They sort of just come to me. What I do buy that I have amassed a huge hoard of is skeleton keys. I must have over a thousand just sitting in some boxes in a drawer and a few scattered around the house. They have no use and are only for collector's value so they're probably not going anywhere. I also hoard seeds but I'm trying not to buy those anymore. Three only ones I'm saving are coming from my garden. At least they will be used at some point.