I dealt with computers for years, bought most of mine from GSA auctions(started during a lay-off, and never looked back) and most of those were from Huntsville NASA, nasa headquarters basically. I always kept an older system to use with older computer parts. I never found it that hard to set up a system for diagnosing older boards and such.
I had the time of a lifetime dealing with that stuff, and NASA Huntsville was the primary NASA base, and it was only about 120 miles from Nashville where I lived. I still have some old SGA systems, one I'll soon scrap has a flight simulator on it but it's of no use to me anymore.