person A: i wanna sell my phone so i posted ad on craigslist. i have 3 potential buyers but i'm so scared to meet them . you never know what people intentions are
person B: Have you ever sold on Craigslist before? I always have the people meet me in the Walmart parking lot during the day. I have sold hundreds of things and have never had an issue like that. 
person A: I did but my husband was with me and now he is out of the country for a couple of months so  i will be alone
person B: It will be okay. You could also have the people meet you at the local police station. The police do not mind and would rather you feel safe.