I don't know why you would buy one, even if it were available, unless power-efficiency was a crucial component for a server. Can you imagine what you could get, on eBay, in a small form factor, for $600?
I made off with a i3-8100T (about 3/4s as powerful, 35W TDP), with 16GB of RAM, and a 256GB SSD in an ultra-small-form-factor case for less than $150. For $600, it makes absolutely no sense against anything used. Let's say it drew 50W vs 20W total use at 10 cents per KWh. It would take 5 years to save $130, if you ran it 24/7/365. A $450 used Intel small-form-factor system would run circles around it in performance (especially after any emulation / code conversion) and you'd break even.
Imagine for a second there are other countries in the world.
Now let's say in Europe, just one of them was called "The United Kingdom", where after a recent (temporary) energy price cap, electricity prices rose to _only_ 36p/kWh (41 cents US at current rates), and further rise are expected, and the cap had an end, bringing us potentially to double the current uni rate, then do the maths again and see why it might be a "crucial" component for many.
Running old, cheap hardware with high power usage has been impractical here and many other parts of the world for quite some time and that was before recent disastrous rises.
Problem is, we are not talking about 10 year old hardware. I find it sadly more likely that hardware from 5 years ago will consume less than hardware from a couple months ago. I myself have an x86 atom where the entire system can idle at <2W, which is no easy feat unless you start reusing phone hardware...
I made off with a i3-8100T (about 3/4s as powerful, 35W TDP), with 16GB of RAM, and a 256GB SSD in an ultra-small-form-factor case for less than $150. For $600, it makes absolutely no sense against anything used. Let's say it drew 50W vs 20W total use at 10 cents per KWh. It would take 5 years to save $130, if you ran it 24/7/365. A $450 used Intel small-form-factor system would run circles around it in performance (especially after any emulation / code conversion) and you'd break even.