Maker: Mego Elastic 
Original Price: $20*
Worth Today: $15,000*

Only eight Mego Elastic figures were ever produced. Decades later, these toys are some of the rarest collectibles on the market. The Mego Elastic toys featured superheroes like the Hulk, Batman, Superman, and more. Mego Elastic Batman can be worth up to $15,000 in unused, still-boxed condition.

The Batman stretches to multiple times its length, much like a Stretch Armstrong toy. Mego made very few of these toys because of a lawsuit that Kenner threatened, accusing Mego of stealing their idea. As a result, the Elastic Heroes were super rare, and that rarity was compounded by the fact that the toys broke down far faster than Stretch Armstrongs.