I think it has to do with my comment of how much it is here in the Philippines. Stores have preorders listed for PHP 19,000 which converted is about USD 330. The math doesn't math completely but it's close enough.
That said, sure, part of that markup is probably BBTS wanting to make a buck, which is fair enough; they aren't a charity and this is an expensive, relatively risky item to carry. Most of it is probably the cost of arranging to ship relatively small quantities of them to the other side of the globe. Kind of like the situation with Haslab projects in this part of the world when Hasbro Pulse Asia went kaput. Omega Prime and Liokaiser cost around $420 each instead of like Star Saber and Deathsaurus who cost the same to back as anywhere else, because the later Haslabs were manufactured in Asia, shipped to the US then shipped back to Asia for third party retailers to sell. Japan is 4 hours tops by plane from here, so I assume transporting products from there to here costs significantly less.