Is it worth it to buy from auctions lots

I know this is an old thread, but the title was appropriate. I went to a school auction today and hit it pretty big. It rained a little right before it started and most of the regulars didn't show up.

I got 8 adding machines, 3 VCRs
7 infocus DLP projectors
4 boxes of wire and cards and 4 big boxes of keyboards.
90 computer towers (average age around 2001-2005 almost all complete with hard drives)
4 Apple imacs with keyboards
6 UPS units broken
3 cassette players
Box of board games and a playstation 2
6 printers not working and 6 CRT monitors
4 flat screen monitors
2 servers
and 20 network switch hubs Plus some misc stuff and a nice work table.

Total for this haul that has my knees shaky and arms sore from loading..........$52........so yes school auctions can be great.

Holly ****! That's a great score you can probablly start selling all those parts out of those towers on Ebay and get like 10x the amount of money you spent, easy. Congrats