Yeah, I have to say, I'd question that figure, as well. Besides the fact I've never heard it before, the Escom A4000T is fairly easily available to anyone who wants to shell out the money for one.
I wouldn't think that would be the case for a system that had a total run of 2000 units almost 15 years ago...
As Redrumloa had stated in his auction, there may well have been less than 200 COMMODORE BRANDED 4000T's. I've only seen two of those. Is this the point of confusion?