I agree with Ully, 600 - 650 is enough for this.
The 950 is ok if everything is working etc etc.
But this has a non working monitor (which could be as easy as a fuse, but we dont know that)
Then some idiot was creative with black paint

also it is missing the sidearts , missing one of the original blue buttons, and the jump button has another plunger.
In general the sanyo monitors are fixable, sidearts are available, buttons; i heard someone on the klov forums was busy in reproducing them but i dont know the status on that.
The question is what is under the black paint, if there is alot of damage, you may need to repaint the cabinet.
Then the add states that the board is running and that the sounds are there.
It could be that its working perfectly, but because of the non working monitor that is also something to assume.
It could be that the board has issues.
So considering all this, that makes me agree with Ully on the 600 - 650.