Dear 'Confused,'
I understand your confusion . . .you are comparing the proverbial apples with oranges. The 'Complete Set', sold only on our website, contains all 17 Plush Buddies, including the Black Hole Stuff Sack. The item you refer to on Amazon (which is also sold on our Website), Is the Solar System Set, and it contains only the 12 Buddies that depict objects in our solar system . . .hence the name.
The intended audience is children . . .but also their entire families . . . who want to learn about space in an enjoyable and yet stimulating way. 'Aside from being plushies' . . . . each Buddy comes with an educational hang tag with both vital statistics and fun facts about the celestial body being represented. Our aim is to both delight and enlighten. And if we could have them manufactured less expensively, I assure you that we would.