Poorly done but might be worth it for the parts. Depends on what they used. If there's an ArcadeVGA, Jpac, etc. that can be harvested it could be a good source for those goodies. It would take a bit of investigation. Also you can probably talk him way down on price.
CP isn't on, makes it look worse than it is. Not a great example and the monitor looks sucky like that...but I see a spinner, and a trackball, good bet there is some sort of encoder board with it.
Not bad price for all the parts most likely, or put a proper monitor in there and make the CP/rest of the machine look better.