I bought this.
The board doesn't appear to be in bad shape, other than being very dirty. After just a 10 minute surface clean it looks many times better, but I'll give it a proper clean at the weekend. Obviously the space bar has turned yellow yet all the other keys white, as with all of these SGI boards that I've seen.
I am surprised by how quiet the keys are, having heard the racket that the regular clicky white alps make, and even compared to the non-clicky Cherry ML.
I bought one of the supposedly "new" Dell AT101W too, and it's waiting at the post office, so I'll pick that up Saturday and see which board I prefer best.