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.