Maker: Hasbro 
Original Price: $10-$20*
Worth Today: $9,500*

As with many of the toys from our childhood, Hasbro was put in charge of bringing the visions of mega-franchises like Transformers to life. The 1984 Hasbro Optimus Prime Series 1 Transformer was a toy that coincided with the beginning of the animated TV series, The Transformers.

The show was based on the toy, and it included Optimus Prime, which is perhaps the most famous of the original transformers. This first-generation toy can sell for thousands if it is truly an original and in mint condition. The professionally-graded toys in protective cases are the ones that sell for the highest amounts.