A very random purchase for me today. I was looking at a local auction site and ended up getting an ex government hp elite 8200 sff with 4gb ram, i5 2400, 22" FHD monitor, keyboard and mouse, dvi and dp cables for $70 ($82 after auction fees). The only thing missing was an hdd, so I grabbed a cheap sandisk plus 120gb for $65 after tax locally. It had a win 7 pro key in it, which just validated a win 10 pro install .
No idea what it will be used for yet, but I love a deal.