Remember all those Saturday afternoons, playing with your favorite robot toys and pretending you were going on space missions or some other adventure? Relive those childhood memories with Masudaya toys. While this company produced many different types of tin and mechanical gadgets back in the day, Masudaya robot models are perhaps the company's most famous and collectible items. In 1984, the company released the YM3 robot, which is actually one of the most accurate recreations of the "Lost in Space" robot from the 1960s hit show. While this was the most famous robot from Masudaya, it's not the rarest or the most valuable. That honor goes to the Machine Man model, one of the "Gang of Five" models. When searching for valuable collectibles, eBay provides many reliable sellers who offer toys from this company, so you can complete your collection and reminisce about your childhood, and feel like a kid again.