I know I'm not the only one who loves a bit of vintage wallpaper. Here's a site I've been meaning to post for a while, Secondhand Rose. I love the wonderful graphic and printy qualities of these and the pattern design. The collection covers a wide range of styles.
"Wallpaper in the attic of the store, represent the world's largest collection of vintage wallpaper. This impressive wallpaper collection, spanning the 1860's to 1970, has been featured on Martha Stewart and is in the collections of museums throughout the world. Kitchen, bathroom, geometric, and floral wallpaper prices range from $70 per roll (60'sq) to $1,200 per roll for original Frank Lloyd Wright designs (90'sq)"
p.s. I've added some tags so if you click the wallpaper listing at the right you can see all the other lovely examples :-)