I got one as a kid outside the zoo. It was Memorial Day Weekend 2008. That turtle is still alive, is female (has laid eggs), and is named Shelley. She's pretty cute and lives in my grandfather's spare bathtub in the winter, and a stock tank in the backyard in the summer. I would not recommend having a red eared slider or really any turtle as a pet to anyone that doesn't already like herps... like a lot.

Edit: I also specifically wouldn't buy a street turtle, like others have mentioned there's a big Salmonella problem, unethical breeding, and they're illegal to own as they're an invasive species