Hot Wheels
Over 4,000,000,000 Hot Wheels cars have been since 1968, and these little cars are cemented in pop-culture. Most Hot Wheels today are affordable but certain ones, like prototypes, are extraordinarily rare. They can even reach prices of over $125,000.
First Edition Pound Puppies Plush
Pound Puppies flew off the shelves when they were first released in the 1980s. Kids loved them, and parents saw them as a great alternative to actually getting their kid a puppy. Now, they can sell for $5000 a pup.