I think people who are into crafts. They have all of these yarns, construction papers, various tools and stuff. All so that they can say that they have all of these projects in mind that they want to do. But they never do them so they get more crafting stuff and it just eats away storage until their place is practically consumed by it.
And when these guys discover local auctions, the storage requirements explode. So many half-broken mowers, engines, chests of old tools - all needing sorting out, fixing and keeping forever.