Another recent review - Whatsminer.net

Whatsminer.net is also a legit site. Apparently from other posts they are an Authorized US distributor of Microbit Whatsminer units. (not Whatsminer.com which I have not seen any feedback on)

I purchased a new unit a couple years ago without issue, and last week purchased a used (claimed to be factory refurbished w/month warranty) Whatsminer M30.
New units are not listed too often and go out of stock in a day.

They have more recently had a few batches of "Refurbished Units" so I went for one.
I arrive from China in about 7 days from payment via DHL which is quite quite fast to US.

I would note that Factory Refurbished really seems to mean just that there is apparently 6 months of their original (or maybe a new 6 month warranty) but a basic air blow out of unit before power up shot a fair amount of dust and a small amount of small leafy material out. It was well packed in original box inside a secondary box. It has been running with no issues for a day now.

Most of the units are sold now with a few M30's and M31's left. They had released several batches over a couple weeks so may be more if you get on their mailing list if interested in any future lots.

I have a couple more units from other sources for Bitmain units in the works and will leave reviews when I receive units.
I used to purchase from Bitmain direct (since 2017), but their limited available units are even worse prices than brokers and for months have fail to respond to my questions about batch origins (as China Units are 25% Tarriff in US and China Factory only recently shut down apparently). I would have ordered form them months ago if they could have confirmed Malaysia or no China Mainland based origin.