20% seems to be a typical rate for the survival of the
rarer computers -
I am told that about 20% of the PERQ 3a's and PERQ 2T4s have survived. Of
course that puts both of them in single figures, alas... Yes I do know
where many of them are, and no I'm not going to post it publically.
That is correct for small(ish) machines, but not for big iron.
William Donzelli
william(a)ans.net