Those who remember the animated series, Street Sharks, that aired between 1994 and 1997 will definitely recall that it was a strange concept. These muscular, half-man, half-shark creatures would fight crime on the streets, despite looking pretty terrifying themselves. While the show was running, Mattel released a line of action figures, which were quite popular. They were no Ninja Turtles, but they definitely enjoyed moderate success with the kids.
The Street Sharks action figures aren't going to make you a millionaire, but they're still definitely worth selling if you've got a few lying around. Some can sell for up to $300, depending on how rare they are. Of course, if they're in their original packaging, you're more likely to get the best out of your old action figures. Start looking through your old toy box!