I assume that by "CP/M" we're talking about 8-bit CP/M and not CP/M
68K or CP/M-86.
I've got a few boxes, including Durango 800 and 900 series (which
also run MP/M) as well as a couple of S-100 boxes and probably some
things I've forgotten about. I'm not a collector; these are things
I've just accumulated over the years.
I still use the occasional CP/M program (under emulation) run as part
of my regular development toolset.
Cheers,
Chuck