I just picked up an HP300 at auction, which turned out to be
a "real" 300 (yuck) from which some kind person had in fact
removed the CPU board (probably actually an act of kindness 8)

Before I cart it off to the tip, here's a list of the
various parts that I have, on the off chance that they
might benefit someone here (no charge other than freight
for any of this stuff).  
(ps. some sod got the 9000/345 at the next auction. Grr.)

98543A	"medium-res colour" (Topcat?)
98625B	HP-IB disk interface
98642A	Async Mux
98561? 	"Human Interface" (Kbd, serial, audio, HP-IB)
98257A  1M Memory? (4x)
98620B  Memory?
98568A	7-slot expansion chassis
98561X  9000/300 main chassis

Any takers (local would make sense for this) contact me directly.

--
Mike Smith  *BSD hack  Unix hardware collector
The question "why are the fundamental laws of nature mathematical"
invites the trivial response "because we define as fundamental those
laws which are mathematical".  Paul Davies, _The_Mind_of_God_