I don't know if I have an ethical gene missing, but I cannot clearly comprehend a moral or ethical issue here at all, unless one is of opinion that anything related to the fouler events in history is to be removed from sight as though it did not exist, which I am not.  I believe that daemonizing such objects may actually generate an unhealthy interest, and that this attitude to history can only result in a distortion of one's understanding of it.

I don't ever hear anyone comment that a military typewriter of the same period from Japan should be similarly shunned, even though gross evil must be associated with that too.  Personally, I put this down to the mass-media's insistence on a simplistic view of any and every topic; easily comprehended and easily recited, but that's just me.

I can, of course, understand someone not wanting to own this machine, but cannot see an ethical issue.  Perhaps some think that simply possessing such a thing implies a certain concordance of outlook with the Nazis, or that ownership may create some such.  I don't, and don't see how such could ever be assumed.

Several of my family died fighting the Nazis, and, for the record, I am no lover of those banal and filthy Nazi politics.

I sometimes see Enigma Machines floating around Ebay. I don't know, but I imagine some people would see it as Nazi memorabilia. I have German ancestry, my family came here after being disillusioned with the Nazi regime. I don't collect Nazi related stuff, but I find I'm curious about what role my family had in things.