I recently imported an antique Snow Trac (Swedish made snow tractor) from the UK and have been working on a restoration, so it is not JD and it obviously not new, but I would say the cost is prohibitive for anyone other than a dedicated nut case who really really wants to deal with fun agencies that have no sense of humor such as the Dept of Homeland Security, Dept of Agriculture, Dept of Transportation, Enviornmental Protection Agency and US Customs. And believe me, you do NOT want to joke around with humorless clerical governmental drones who's salaries you pay!
You'll find all fluids must be drained which makes it hard to load and unload! You'll find that because it MIGHT POSSIBLY have been in a field where "mad cow" disease MIGHT POSSIBLY have been present a few years ago that you have to have the tires (in my case tracks) cleaned and certified, you'll have to post a bond for 3 times the value of the machine, you'll have to work with an importer to get it to a port here, you'll have to work with a freight forwarder to get it from the port here to a shipping dock where you can pick it up, blah blah blah blah and don't UNDER-estimate the cost. It is NOT cheap to ship an automobile size vehicle across an ocean!