Machine brand new with delivery & shaker motor fitted was just under 7 grand for those who paid up front in full to take advantage of the then AMD Super Container deal.

That price was based on $6100 to $6300 min price plus delivery plus shaker motor & fitting. This was when the Aussie dollar was at its BEST.

So if new was 7 grand, you have to go from there.
If the machine was still being made today it would be apx $8400 delivered with shaker etc.

I have a mint ACDC Pro with less than 300 games HUO.
I wouldn't sell it unless I got something between $4500 min to say $5250 because a lot of them have been sited and you really want a one owner game with low plays that is minty like new.

Most Stern machines do hold their resale values rather well.
People are paying similar $ for 1990,s DMD titles so I think the $4500 upwards figure wouldn't be hard to achieve for the best of the best ACDC Pro example.

See what others think. Good luck with your hunt.