I could not resist the temptation to try one of those drives.
At $12.43 per TB for a 16 TB drive, I purchased one.
I figure that the risk is minimal, because the drives are returnable. So I would buy one, test it, and decide whether or not to keep it.
Also, I sent questions to the seller (via Amazon’s messaging feature), and the seller replied quickly and answered my questions. One of the answers was that the drive comes with a 2-year warranty, through “Tech on Tech” (so that could turn out to be problematic, it they are hard to deal with on warranty issues).
My package arrived yesterday, and to test it, I copied 16TB of plots to it – figuring, if all gets written with no errors, and the drive does not make “failure” type noises, then it is probably in good shape.
That ended up being the case. No issue, and it runs quietly.
The packing job that they did is top-notch, which if it is any indication of their credibility, it bodes well for them.
From the outer box, to peeling away each layer to reach the drive:

So the drive was in an anti-static bag.
The anti-static bag and drive were in a protective, plastic molded bubble of sorts.
That plastic bubble was in a cardboard box.
That cardboard box was in the shipping box, which contained bubble-wrap to protect the inner carton.
Well done!
All that is left to see is if the drive lasts. Based on the 175 MB/s to 285 MB/s writing speeds, as well as quiet operation and no vibrations, I have a good feeling about the drive.
And I suspect that the slower writing speeds are from writing to the inner portion of the platters, which I believe is common for mechanical drives.
By the way, I took the photos after I connected the drive and it is in use. So the photos are not real-time of me doing the unpacking.
Lastly, the drive’s performance is while connected to a USB port via an adapter (I cannot get into my case to connect it directly, without a lot of trouble).