They were presumably shipped out there? So it can't be too enormous?
$322 shipping for a cabside plate to Florida. Almost all the items have a "provenance" section saying when and where they were obtained, and on that basis I suspect that most are genuine / above board. We don't know how they got to the USA but shipped in bulk (a container of stuff) the per-item rate may have been reasonable. I don't recall Lisa's 40' container being too expensive when we shipped her over to the
UK▸ , but then I was more concerned at looking after Lisa than the stuff in the container.