The Hot Wheels fandom is real, and it also happens to be lucrative. As one of the most popular toy lines in history, Hot Wheels has become more than just its own product; its become a frenzied hobby under the toy and collectible ecosystem. And like most hobbies that have developed a strong fan base, collecting Hot Wheels castings has become a lucrative endeavor. Rare versions and unreleased prototypes command top dollar these days, and the amount that they typically go for will make your eyes pop out. Some Hot Wheels castings are understandably more expensive than others. Thats especially true for the models we identified on this list of Hot Wheels that are worth a small fortune these days.