I think a price around $1000 would be ok.
It's an AS-IS item. If it don't work, you just flushed that $1000 down the toilet. Sorry, but without any assurances at all of any kind that thing thing might actually work, then it's not worth more than a couple hundred $$. To me anyway. I paid $700 for one that I was assurred worked fine. A few years ago.