Others have already told you, but why would you SHIP, if you're selling on Craigslist, craigslist is meant for LOCAL in person, cash only transactions.
Also, as another poster pointed out, there is a LINK on the FRONT page of each city's craiglist's about scams(avoid scams and frauds). If you'd have bothered to read it, you wouldn't have to even post here
The first thing it says(when you click the link) is:
DEAL LOCALLY WITH FOLKS YOU CAN MEET IN PERSON - follow this one simple rule and you will avoid 99% of the scam attempts on craigslist.
Thanks, Captain Obvious. It was pretty clear that I wouldn't do this deal after the first couple of replies.. I just wanted a simple explanation not some condescending comment like your own. That's why I posted in the ADVICE part of the forum