If they are
original IBM systems, then I agree. If they are clones, I
usually salvage the drives, perhaps the I/O cards if they are exotic.
Otherwise I'd junk them, you'll drown in those systems otherwise.
IBM PC
XT, AT, AT 386, PS/2, (probably PS/1?) and such machines. With keyboards and some
monitors.
Announce them at the vintagecomputer forums if you care about saving
them, some people there really want XT and AT machines.