I would imagine the point of the "junk" machines is to show progress over the "classic" machines. Hell, even I nabbed a near mint IBM PS/2 from outside the dumpster simply because it's nearly classic. Someday it will be. I sort of regret giving up my MFM/RLL hard drive collection almost 10 years ago. I almost miss that "hammer and chisel" sound they made. Miss my Zenith Data Systems 8088 with 2 30MB RLL drives and an amber monochrome screen. Miss the BBS days.
Ahh nostalgia.
