I've a collection started in the seventies.
A few S100 or CPM systems including classic like Cromemco, Osbourne 1 and some kiwi built models.
Synertek Sim-1 and KTM-2/80 (my very first computer, owned from new)
In the PC line, a Sirius, IBM PC, IBM portable and a few early x86 and Pentium 90.
BBC B and Master co-processor
Some Sun Sparc II and III
And a pile of parts, boards, mountain of floppies and drives of all sizes, tape drives of most types with tapes, hard disks, controllers etc....
I no longer toss much stuff out, as it is getting too expensive or simply impossible to find.
In all, a huge range of stuff collected over my 35+ years in IT.
I'm currently working on cataloging what I have, and gathering info where possible.
It will take a few years at the current rate, and then the job of getting them all working again.