I picked up this machine as part of a bigger lot. An office had been locked and unused since the early 1980s and was only opened up again in the mid 2000s. There were two computers in there and this was one of them. It came complete with instructions and all the paperwork. I have no idea if it works but check out that keyboard! They don't make 'em like that any more. The Sirius 1 was apparently designed by the same chap who designed the Commodore PETs. You can read more here.