I've been thinking about what I wouldn't turn away.
I'd certainly like to have some of the more obscure development
systems for unusual microprocessors, particularly if they included
software. For example, the GI GIMINI (CP1600) or whatever it was
that National used for the PACE or IMP-16. Or that used for a
Rockwell PPS-8, etc.
Those would be small, rare and interesting enough to collect.
--Chuck