Those are keywords of a scammer: My shipper will be coming to pick it up.
Paypal may indeed credit your account with the funds based on a check they received from the scammer.
Once the check bounces, you will be responsible for the bad funds fees and your pin will be gone.
But, more likely they are simply trying to get you to email them with your personal email address so they can sell it. That's why they include their address instead of craigs email system.