I received a MicroVAX II in a BA23 case awhile ago.  It came with a Rainbow 100 and was found at a local thrift store that was 
run by a "charity" for the disabled.

No, don't ask why I use that term with quotations.  That's a story I won't tell.

Does it work?  Yes.  Have I made progress?  No.  Doing any work with it is a two-person job with more space.