Not sure who they are, but they said they could sell my car for a lot of money, much more than I was asking. My car is listed on CraigsList, Cars.com, and Autotrader.com I told them to remove my name and number from their files and hung up.
I also have a vehicle for sale in Autotrader and have all too often gotten this type of call. Some outfit I have never heard of that wants to sell my car...
I report them to https://complaints.donotcall.gov/complaint/complaintcheck.aspx. They are in violation of the no-call list.