Just make sure you use a good shipping outfit like USPS, FedEX, or DHL, and you should be fine. Presuming the shipper (be it you or them) do the aforementioned paperwork, all should go well. Ideally, the USPS is the best method to ship, so if your parts are not so large/heavy, they are far and away your best bet - good delivery time, no hassles in terms of brokerage fees, etc., and from my experience, safe handling.
DISCLAIMER: I am the importer/distributor for all Opera Audio/Consonance high-end audio equipment in the USA and Canada
DISCLAIMER: I am the importer/distributor for all Opera Audio/Consonance high-end audio equipment in the USA and Canada