I would be really careful about giving roosters away (or charging only a small price for them) on Craigslist.
In West Tennessee where I live, cock fighting is all over the place. These guys will tell you anything that they figure you want to hear so that you will give them your roosters, then they raise them to be mean enough to win the cockfights.
The treatment these roosters get is horrible, completely inhumane. And they get a pretty much never ending supply of fresh meat for their cockfights from places like Craigslist, from folks trying to get rid of their packing peanuts.