I have bought and sold several things on Craigslist and have not had any problems. As long as you are careful and check it out, you should be okay.
I had several emails from scammers who wanted to "buy and pay extra, etc,", but they are easy to spot. Their language is lacking and they all say the same thing. When I sold my laptop (and I did sell it on craigslist) I had four of these letters from four different guys. After the first one, I just trashed them.