I saw one of these in action at a Amiga show in 1998.
It was very cool. It was a bit bulky to be considered a laptop. I would say that it was more of a "luggable" A1200. Does the seller not have a amiga to test it with? From what I remember you slide your Amiga 1200 into the side of the case and it hooks to the keyboard, LCD, and Battery?