About 2 years ago I was chasing one of these. I saw 3 sell all on ebay all around the same time.
One that I actually went and checked out in the flesh . Was in good nic but needed a good going over and clean rubbers globes ect sold for $1400. Another really nice looking one (from the pics and de******ion) also sold in QLD for around $1500. The other which was a pretty rough sold for $1100ish.
This was a couple of years ago and I think prices were a bit higher then so based on this I would'nt mind paying around the $1400 mark for a nice one say around an 8/10.
Was a good fun game to play and one I remember playing back in the glory days.