Boxing up is about $250-$300, then you have around $400-$700 in actual freight (depending on where it's being sent), plus collection fees at the sender's end, and clearing fees at the receiving end.
Can't even save money by DIY crating, as the wood has to be certified disease-free and stamped under a mutual quarantine program called ISPM.
It works out better sense to buy two complete drivelines and ship together, as the extra cost of cubic space won't be huge, while all other costs barely change.