When I was younger, I used to go around to antique stores and estate sales and page through antique postcards. Most of the time, they would be in a little plastic shoebox, and you could flip through them as you would at a record store or something like that. Most of the time, you would see the same sort of themes but almost never the same image twice. Some boxes would be mainly photos of buildings, national parks, homes, and things relating to travel. There was also an abundance of Christmas postcards with rather elaborate lithographed colors and metallic inks. A step up from the Christmas postcards were the Valentine's day ones. Even better still and much rarer (according to my google searches at the time) were the Halloween postcards. Richly illustrated and chock-full of Halloween imagery, these postcards could sell upwards of a whopping $25. So naturally, those were the ones I wanted. As it turned out, the Google searches were correct, and Halloween postcards were few and far between. On the rare chance that I would find one, I pored over it for a while until the next one came along. Even in the postcard collecting community, you have to fork it over to get the best of the best.