I only do face to face cash sales at a local business with cameras on the parking lot. I conceal carry and my wife is always "within range" should anything get weird.
I recently had a CL scammer text response for a vehicle I was selling. They kept asking me to call number other than the one they were texting me from. When I asked why, they said their battery was low. I called the other number and it was a Google phone number with a computer voice that wanted info from me. I called the 1st number and got no answer. I texted them that I would only talk and NOT text anymore. They kept wanting me to call the other number. It was very shady.
The "text only" deals are usually bots... scripts/programs running on a computer designed to respond based on word pattern recognition. Their initial contact is automated too... one person running these programs will send out contacts to thousands of CL listings per day while the guy sits back and waits for the sucker to bite.