I had an SE/30 in college that I got for free somewhere (this was in the early 2000s). It worked fine, but I didn't have a network adapter that would get it on the network, so it was of limited use to me. I think it was still sitting in my parents' garage last time I looked.
Apparently (according to someone I went to college with), Apple postfixed the names of their computers with 68030 processors 'x' (eg IIfx).
They couldn't call it the SEx, so they broke convention and called it the SE/30.
At one point early in the Mac's history, Apple marketing tried to tell the world that SCSI was pronounced "Sexy", rather than "Scuzzy". I guess they'd finally been told the name of the machine's hard drive port and someone got unhappy.
This attempted name change went over about as well as you would expect.
[I think they could have capitalized on the SE/x and done a really good marketing campaign if they'd not been terrified. On the other hand, opinions like this are one of the reasons I'm an engineer and not a marketing type... :-) ]
Apparently (according to someone I went to college with), Apple postfixed the names of their computers with 68030 processors 'x' (eg IIfx).
They couldn't call it the SEx, so they broke convention and called it the SE/30.