PayPal Scam?

Is there anyway to be scammed through Paypal? I have a Piano that I'm selling and the seller wants to pay me through paypal.I have done lots of transaction through Paypal and have always thought of it as being safe.But just to be on the safe side as there are lots of crooks trying to get our money . Is there anyway that I can be scamed through paypal as they have to come to my place to get piano and want to pay me through paypal?
Thanks!