All of mine are in decent working order, although the oldest tower from ~2007 I think, gives me a warning that a fan has died on startup. Don't think I'll bother to fix it. It's just too damn slow for me now. Or maybe I will. It just sits at the office, hasn't been on in months ever since I transferred the credential certificates I needed off of it onto my new workstation.
Also have a Blackberry Bold 9700, which does still work. The other smartphones are HTC One M7, Galaxy S5, and Note 5. The note I'm currently using. Also have a blackberry bold, but I don't consider it to be a "computer" although I do miss that keyboard.
Tablets are;
Amazon Fire 7 - Great for the price.
Amazon Fire HD10 - Good for streaming/movies, and that is it. Shit for anything else.
Samsung Galaxy Tab 3 Lite - Painfully slow, horrible screen. If I hadn't gotten it free, I would return it.
Nvidia Shield K1 - Best gaming tablet currently out there, with the possible exception of the Pixel C, which is 2-3 times the price.
Samsung Galaxy Tab S2, newest version. - Amazing tablet for productivity, email, browsing, etc,. Firefox with Adblock plugin feels equally as responsive as a PC.
2012 and 2014 laptops, 14" and 15" 2nd, and 4th (I think) gen I5's 4 and 8gb ram respectively, 120 and 240gb SSD's. Older one is an acer, newer one hp.
Two of my home PCs are alienware alpha's, I5, with 8 and 12gb ram, 500gb, and 1tb SSD's. They run my TV's.
At work, Dell inspirion with I5 4460, 8gb ram, 120gb ssd, 1tb hd, and gt 705, which is just enough to run dual monitors.
Main home PC, Dell XPS 8900, I7-4790, 12gb ram, 500gb samsung evo SSD, 1x1TB HDs, and a very very long in the tooth evga gtx 460.
Eagerly waiting for the 1070 and 1080 cards to become available.