Have had great success with this myself. Oddly resellers on Amazon seem to be the best source I have found, just search for something like "HP ProDesk" or one of the generic corporate-focused lines from other manufacturers and find one that fits your budget. Maybe filter to 100-300 dollars to get rid of the new stuff. There's also a surprisingly vast selection of recycled commodity servers and similar on there, too.
That's... Odd. I didn't click my own link yesterday after posting, but that was straight from Google and it did load just fine. Now I get the login too. But for completeness sake, another example: https://www.fujitsu.com/global/Images/wp_ESPRIMO_P758_E94.pd...
That happens. I've once foolishly linked brochure page for a trash-found HSM on social media, supposedly that logged too many referrers server side, and the URL was mis-configured into something else less than a day later. It wasn't even a 404.