Same as others-called, didn't leave a message. Undoubtedly a scammer. Anyone else finding a correlation between using Craigslist and an increase in these scam calls. Just a hunch, but seems to be related to when I post on Craigslist.
You're right. People don't understand that you can simply program a computer to call thousands of numbers a day. They don't need the actual number unless they want to address you by name.