Collecting Vintage Transportation Postcards
Transportation postcards are a fun category that appeals to a lot of people.
With more modern topics, such as aviation, you won't find really old postcards. But you'll find everything from tall sailing ships to steamboats in ships postcards, and railroad postcards feature everything from old steam locomotives to modern trains - plus train stations. There are so many things you can specialize in under the transportation category, and so many postcards available, that it's a good category to get started with.