Lately, our local Craigslist has been awash with fake ads, featuring ‘too good to be true offers.”
There must be some marketplace for active email addresses, because these vermin respond to your detailed inquiries with a boilerplate response to the effect of “Send me your email address and I’ll send you the pictures.” This, even though you did not request pictures, and, the reprobate provided no verbal answer to any questions you might have asked.
Granted, I live in Huckster Heaven, so this will probably not get any better.
Caution is certainly in order whenever you reply or respond to a CL ad. You can usually weed out the scammers rather quickly. Like when they ask if you still have "the item" for sale. Ah.... what item might that be? Or, you enquire about a piano, and the seller is currently out of the state, or the piano is out of state.
You're right about the email address... phone numbers too; must be a blackmarket for it. But some of that info can easily be found on the internet. It is amazing how much you can find out about someone just by Googling their name and a general area city/state.
I used to cruise CL pretty often looking at pianos for sale. Now, I like Facebook Marketplace better. There's still probably scammers on FB, but at least you can find out a little more about them, usually.