I export vehicles to Europe and the middle east with regular occurrence. There is a premium on HCs in terms of value, but a large part of the price difference between here and there lies in a web of fees and modifications needed to be made to get the car to pass through customs. You simply cannot ship your vehicle from the US to Poland, for example and have it come off the boat or plane in the same state as it was when it left the US. Maybe ambassador staff can, I don't deal with that form of legality. But most people, no. You have to perform modifications to ensure the vehicle meets emissions and sound ordinances. You also have to have a valid import permit and pay any taxes or fees. And again, if you aren't getting free or reduced cost government transport, you have to pay to ship the vehicle. Depending on where it's going, it can cost up to 30 grand or so. There's a reason why I ship mostly to the Middle East like the UAE or Bahrain... their import laws are lax... and depending on who the customer is, sometimes completely nonexistent. This is not the case in EU countries and some Balkan countries are just weird. Some are open, others still operate like they're quasi-Soviet states with strict controls on imports and exports.
In summary, you need to check with the country you're planning on importing to so you can get what the import duties are and if they're even permitting the vehicles. Some countries permit only a limited number. Some will allow a permit, only if the modifications are made prior to arrival at customs. You'll see this regarding side mirror size or placement location, right hand vs. left hand drive, and so on. Most American vehicles going anywhere in Europe will need to be "detuned" and have an upgraded emissions system, at a minimum. So at least plan on paying for both a PCM tune and a TCM remap. That right there is about 3 grand alone.
Of course, when you do the required work for export, the vehicle will have no manufacturer warranty in-tact after the fact. Things to think on.
Lastly, as a former US service member who served abroad, I don't think it's legal to sell your personal vehicle you shipped over unless it meets all the aforementioned import duties. The laws and rules may have changed, but at least when I was over in that neck of the woods, we couldn't ship our sports cars over there to unload willy-nilly for huge profits. The cost to get a HC through customs in these countries can be staggering. Including the value of a new HC, it costs about $180,000 to get a car through Australian customs, which is why they sell them down there for $200,000. I don't know the deal in South America... but you personally wouldn't catch me driving an expensive car in any South American country save MAYBE parts of Brazil. Every other one, you're more likely to get gun jacked (I spent time in Brazil, Honduras, Mexico, Panama, and Nicaragua).
Thus, in short, you can plan on it costing you anywhere from 50-100% the value of the car's MSRP to get the car into some of the European countries. Then, you would have to sell it for around $150-$200,000 USD. You're not going to do that easily. Hence why those of us who do import/exporting, usually have a client wait list and a verified sale before we even begin the process of converting and moving the vehicle. This would be especially true in the Balkan states, as they are overall mostly impoverished nations. Selling a HC there is many times the annual salary of the median worker.