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.
I send you the money. You send me the bitcoins.
PayPal fees on your side, though I am covering it up with my offer price markup (I pay you more than a bitcoin is actually worth currenty)
Payment sent as goods & services.