I've been looking to get a 2019 Mac Pro as replacement for my cMP 3,1. That lovely computer is still going strong thanks to OCLP and various upgrades over the years, but it is getting a little bit long in the tooth performance-wise. So I'm considering a 2019 model as I like the expandability of the Mac Pro design. Compared to 2019 Mac Pros sold in the EU the US prices are quite enticing.
Anyway, I wanted to mention that I recently bought a CalDigit card from the US via eBay and chose the option of "eBay International Shipping". As a result didn't have to pay any VAT or import duties to the Netherlands.
Several sellers offered the same card and the same International Shipping option. For some sellers, VAT and duties were added in the shopping cart, but for some nothing at all was added. On
eBay's buyers page on International Shipping it says that one should be presented with two options: "Pay import charges now" and "Defer import charges until delivery". The sellers I found offered the former option but some had 0,00 USD as charges to pay at the time of purchase whereas others had a stated fee there. I picked one with 0,00 USD and received the card without having to pay anything extra when it arrived in the Netherlands.
iPowerresale doesn't seem to offer the International Shipping option, but instead offers UPS Worldwide Expedited which I take to mean that the parcel would be intercepted by customs (and that shipping option is also a lot higher than some other options).
eBay says the option is not available to all US sellers but is being rolled out. There are also size, weight and value limits which a Mac Pro may hit.
But I've seen some US sellers do offer eBay International Shipping for these machines. For instance here's a cart from a seller that does who seems to add no additional charges. Now I don't know how different countries manage this system and if there are value limits which result in cheaper items, like a PCI card, being ignored.
Check for yourself to be certain what will happen when the item crosses a border, but it may be worth it to look around and read the fine print. I thought it was interesting to see that the same option was treated differently by different sellers.