When you sell an item to someone who does not live nearby, chances are you will need to ship the item. If you accepted payment via PayPal, chances are good you can find the buyer's address easily. PayPal typically provides you, the seller, with the address of the person who made the payment to your PayPal account. This is not immediately displayed, however, and you must know where to look to find it.
Log into your PayPal account. This displays your recent activity.
Scroll down until you see the transaction for which you wish to view the buyer's address.
Click the "Details" link in the transaction in question. This displays details of the transaction, including the shipping address of the person who sent you the payment.