Craigslist is clear they do not police sell or buy posts, and take no responsiblity.
eBay is the opposite, if you get scammed they will do as much as possible to make you whole again, including (since they own it) getting PayPal to go after the scammer's bank account.
They did this for me once, and cleaned out the scammer's bank and refunded me, and got the scammer arrest and convicted.
Anything you can pay for with PayPal automatically gives you some purchase protection. PayPal may try to get your money from a bank account that has been closed but they will try. And they will provide the cops with documentation to help with prosecution.
Funny, but Amazon has the best of all the purchase protection plans. The A-to-Z Guarentee covers not just Amazon-supplied items, but items sold by individuals and businesses too. So if you don't get what you paid for, they will refund your money and then go after the seller on their own. And you do NOT want Amazon going after you, thats the 2,000 pound gorilla in the room you don't want mad.
Living the Gypsy Life