From my experience with PayPal, I recommend for the buyer to do the transaction and mark it as gift that way I won't pay a surcharge or the buyer will not pay a surcharge (either way PayPal wants some sort of Surcharge because I had to pay a surcharge for an international mailing months ago).
In my case if mailing out a parcel package or Priority box, I buy delivery confirmation (as needed per package) at the PO that way I can track the shipping online.
You cannot go wrong with Delivery Confirmation, it's better than paying the surcharge to PayPal.