Are your sheds getting full and you haven't yet finished collecting? You might think about collecting farm equipment postcards. They require little storage space, you can keep them in the house, they don't have to be dusted, and they cost less than the real thing.
The people who collect farm equipment postcards aren't going to be happy that I tell you this. They want to keep it their little secret. But I think there are enough cards to go around: You just have to look for them!