I wanted to sell bunch of stuff last year and this is what I found out after some research and it worked out for me:
Some fish for your email and sell them. They don't have your email address. Craigslist has an encoded contact email for you that they see but once you reply back to their email, they can see your name (if in your profile) and real email address.
Best is to have them text or call you. Having only your phone number is safe I think. You can then get a good feeling what's going on. You may also receive bunch of automated scam texts when you list something but they are easy to identify.
Don't respond to texts quickly. Also never text "yes". lol
That's how I think they get a fake Google phone number under a fake name but with your phone number to do some illegal activity. Not sure how it works but they can set it up and if within few minutes you respond yes (they ask you "do you still have it?" ), they get you. I researched and read about it last year but got a headache.
Let them text, you get a feel for it.
Don't respond back immediately and wait 20 min.
Never just say yes in a text.
When in doubt, call them back.
Never give them your name and home address.
Meet somewhere public to transfer goods.
We have been selling junk since last year for a move and did pretty good. Only twice someone had to come to the house and I screened them pretty good by talking to them on the phone and bunch of texts. One of the items was a free chest freezer. I put stuff in the bed of my truck or SUV and met at a public place nearby. Even for free stuff.
Kind of sad but it's better to donate or recycle free stuff than dealing with crazy people. I had people asking if I have change for $100 bill. I said there are few stores nearby and never heard back