Not good.
I got my AV9000 about 4 weeks ago. It was cheap as it was not working so I took the chance.
It displayed error 1 and that was it. I could insert and eject a vhs tape though. The monitor would not switch on. The red light stayed red.
It had a defect tuner, some soldering jobs and powersupply. The set top controller was also in trouble.
Now it's back in working order but it ended up being the same price as a good used one without mcav or Beolab 6000/8000.
I have read about error 0. Something with not being able to connect to the bottom part. Not to expensive.
Again it properly needs a qualified service as nothing is 100% sure untill you have a look.