Customs declarations would then be his responsibility, so opening inspecting and repacking is the correct way to do it if he is the shipper overseas. Then if their is Ebay issues or item issues, (lost, wrong, or broken) between buyer-middle man-seller, it would lead me to believe its a bit more than just handing off a parcel. It's possibly why others providing this service charge a lot. You never truly know how many idiots are really out there sometimes until you list an item on Ebay.
Patches are for Pirates and pants, not a bulkhead and chassis!