There are so many official Lego Minifigures out there. Thousands and thousands of unique designs. Many of the Minifigs are worth a lot of money, but a few of them stand out. Over at Mental Floss they have compiled a short list of some of the most rare and exclusive Minifigures. Most of them are promotions chase figures associated with certain events. If you happen to have a Red Sox Fan, Cloud City Boba Fett, New York I Love Yoda, International Space Station Alien, or other rare Lego Minifigures, you may have something worth over 500 dollars!
Check out the full list here: https://www.mentalfloss.com/article/55576/20-rare-and-really-expensive-lego-minifigures