You can't protect yourself.
What you can do is ensure that whatever you are doing is done to safeguard yourself as a seller.
Do not let yourself be bullied into a persons buying pitch, there are 100's of long winded get under your skin techniques.
Do not sell anywhere that a Buyer Protection is a enforced method for the Buyer to make a Payment.
Typically a few Months can lapse before the use of the protection can kick in.
It is very important to have a sale with the residual overhang and menacing that can be brought into the sale.