The scam is this.
You accept Paypal and a Nigerian Prince does in fact come and pick up the item. Scammer then contacts Paypal and says you never delivered the goods. Paypal who almost always sides with the buyer then freezes the money in your account until you prove you delivered the goods. You have no proof of delivery, you lose. Scammer has your gun and ultimately his funds are returned to him.

"IT'S GOOD TO BE THE KING !!"

KY Jon..."partial refund", too funny.