We have no idea. Craigslist is the Wild West, where anything can go. There is nothing to filter their listings, buyer beware.
https://www.inmateaid.com/ask-the-inmate/i-saw-an-inmate-on-craigslist-looking-for-a-penpal-are-these-scams-or-legitimate#answer
Accepted Answer Date Created: June 01,2016