PayPal is one of the riskiest payment methods and a favorite of scammers. Ask for ID with selfies and signatures and check for photoshop. http://fotoforensics.com/ It is best to call PayPal and tell them you are selling bitcoin as they allow it.
"give paypal mail"
"when i pay you agree to instant release"
"if any problem come from you paypal account i'm not responsible and you need to fix it whit paypal
in case if you dont want release a dispute will be open and i will win"