I have also
seen early SGI equipment, but not much early Sun (I do not know why).
In my experience, Sun offers much more generous trade-in allowances than
SGI (at least in the educational market). For this reason, I'd imagine
that a large percentage of old Sun systems are sent back to California for
scrapping or dismantled in a manner that ensures that they will not be
traded in again. OTOH, I know of an SGI 4D/380 VGX that recently met the
scrappers (alas, before I could attempt a rescue) because of red tape and
the similarity of resale, scrap, and trade-in values.
By older Sun, I mean Sun-2. The stuff is still around, but not in huge
gobs like the Sun-3s. I would have expected SGI Iris (pre-4D, that is) to
be rare, as the company was still very small then.
William Donzelli
william(a)ans.net