errrr....the cost for someone like me (a bike business) to ship overseas a complete bike is usually too exorbitant (i.e., several hundred $$) for most of my customers to even consider, regardless of how efficiently I pack it up. If a customer orders a complete bike from me and lives overseas, I generally send the frame/fork separately from the rest of the components, to keep the cost somewhat manageable by keep box sizes smaller. For that task I use USPS, which last time I checked, are the most affordable option and allow full insurance coverage, via Priority Mail. But box length plus girth cannot exceed 108" with USPS. Bike boxes exceed that dimension. Last time I shipped a bike this way (frame/fork in one box and parts in the other) it cost the customer about $150, but she was on a military base so received discounted charges. For Jane Average (non military), I would expect to pay at least $200.
Then, once you receive it, you must get the bike reassembled.
With both USPS and other companies, be aware of "surface" shipping charges, as those situations often take bikes months to arrive.
In general, I don't recommend doing this unless cost is not an issue. You will also pay some kind of customs fee on top of the shipping fee, as you are aware.