Necroposting (sorry) - had to comment on this though, since you don't see many of these in the wild. I've an EduQuest Forty-Five that I picked up a few years ago for $75 shipped. Absolute steal, as I'm a sucker for old AIO computers. I wasn't expecting to see one here, or someone else local with one.
Congrats on finding this for free- hopefully you've an old Model M to pair it with and are still enjoying some of that DOS retro goodness!