IMHO, it depends on the ad. If it claims to have origianl box, unless otherwise noted it should have the original packing material. If it reads buyer pays shipping then buyer should pay for packaging (other than the origianl box and packing material if so advertised as included in the ad). If it reads seller then the inverse is true. If the ad reads split costs, then split costs. The shipper is responsible for doing it right and according to agreement. If the item is damaged in transit the seller should assume responsibilty. If the seller demands certain packing requirements, so be it, unless the buyer explicitly waives the the sellers responsibility and assumes all responsibilty. This is all part of the negotiations that preceed confirmation of a deal.
