When you list something on CL, if you make it impossible to reach you by email (phone # only) you eliminate 99% of the scammers. And they will pull this scam even on a $20 item!! unbelievable.
I use a Google Voice number so I don't give out my real number.
When I retire and have plenty of time on my hands (ha!!) I will spend all day luring the scammers in, sure send me those "money orders" -- hey it takes them some time and money to create and mail them - keep em busy. Then I will use them for wall paper.