Have had this same scenario play out several times myself on CL. The other most common scammy post is a roommate.com one where when you get in touch with the poster, they have you go to a roommate.com link which basically requires you to sign up for a ~20$/mo membership. I get the need for such sites but I've seen this so often I consider it a scam and wonder if, like hired shills and trolls, people get hired to post such content just to drive membership.