CRAIGSLIST WARNING as published on their site:
Avoiding Scams
Deal locally, face-to-face —follow this one rule and avoid 99% of scam attempts.
Do not extend payment to anyone you have not met in person.Beware offers involving shipping - deal with locals you can meet in person.Never wire funds (e.g. Western Union) - anyone who asks you to is a scammer.Don't accept cashier/certified checks or money orders - banks cash fakes, then hold you responsible.Transactions are between users only, no third party provides a "guarantee".Never give out financial info (bank account, social security, paypal account, etc).Do not rent or purchase sight-unseen—that amazing "deal" may not exist.Refuse background/credit checks until you have met landlord/employer in person.
https://www.craigslist.org/about/scams