I've bought this directly from XinDian but its actually a little bit too large for my application and CNC. So I've moved to 52mm.
It's completely new in box and unused. There's no fault with the unit. Comes with all of the covering discs, t nuts, and bolts. As well as 28 studs and the gridfinity holders I printed for them (PETG).
You can import them yourself right now, but when I've checked its 100% tariff. So what you pay would be double what you see on their website.
You can purchase it via amazon as well and that will be about $550 and a 4 to 6 week wait time.