Horrible, horrible mistake if they are only offering this as an assembled system in the long run. I venture to say a good deal of the prospective buyers - old timer Amiga guys - are more than willing and skilled enough in the hardware department to assemble their own computer from components.
For people willing to build their own rigs, having a pre-built (and overpriced) system with what may be viewed as an (IMHO) ugly case/keyboard/mouse is a big turn off. I would not have bought my SAM if it was only available in pre-built/complete PC form. It's a hobbyist system, and hobbyist system users like things their way.
Best of luck to them, I suppose - but I think it's safe to say if the new SAM board is fairly priced, it will sell like hotcakes compared to this.