Unless, of course, a machine has a bad case.

I once cannibalized a very nasty looking SE/30 (it was beyond bad cosmetically...someone went wild with the Mac Cracker on the edges of it) and put the logic board in a very nice looking SE (which I actually sent to my cousin). That also left me with an SE FDHD logic board that I upgraded a regular SE with. (I prefer those mostly because of the easier to remove and replace battery--even if I have an 800K drive in the machine).