The list author says: "Swapping postcards with friends around the world is a fun and relatively inexpensive hobby. You can cut down on the costs even more when you buy a book of postcards rather than purchasing them individually. This list compiles some of the best sets I've found including classic must-haves, really good values, and unique, diverse collections."
"A box of 100 loose, standard-size postcards with artwork from every Pixar film/short up through 2005, including concept art, sketches and movie frames. Colorful, high-quality - great for framing, too!"
"What's more classic for a traveler than "Where's Waldo?" These 30 postcards have rounded corners and lots of writing space, and attached to the binding with adhesive so they're easy to tear out and won't leave weird perforated edges."
"Each of these 100 postcards features a different Penguin book jacket, iconic and instantly recognizable with several common features. Some might be disappointed by the lack of obvious variety, but I think they'd be great for book lovers and/or postcrossing."
"These 30 sturdy, standard-size postcards are full of dry humor and clever artwork by Nova Scotia-artist Ray Fenwick. Not as good a value overall as the 100-card boxes, but still only about $0.33 each."
"A good mix of classic DC Comic cover art is featured on 100 different postcards (slightly smaller than standard size). Higher ratio of popular characters like Superman, Batman & Robin to lesser-known ones such as Green Lantern though."