I would just expect a person posting a job on Craigslist to be out to scam me or have no idea of how expensive software is. No one wants to waste their time filtering through the postings asking them to rebuild facebook for $100.
See, now I am not in software. I'm a hardware guy. I like the less desk bound jobs and have been lucky to get to do them for a bit. That said, I still have no idea where the job postings actually are.