The only problem there is that most of the time they
lack the Y-cable,
without with the card is considerably harder to use (if not impossible).
That's one of the few classic machines I'm keeping, mostly because
it's tiny and a twofer.
I have an LC 475 with a SCSI-ethernet adapter, //e board with
Y-cable, and both 3.5" and 5.25" drives. Oh, and a Raritan adapter so I
can run it through my KVM.
But an LC 475 is hardly an LC II ... :) it verges on useful!