It will be interesting in years to come to see ACDC pinballs for sale on Ebay saying HUO... the term will mean very very little
It never meant much to me anyway. Just an excuse to tack on $1500 to the price tag.
Actual condition has always been king to me, especially these days since most of the Sterns located onsite (in my area, it is mostly pub locations) rarely get played. I watched an op empty out the cashbox of a Family Guy for the princely sum of $12 ($4 of that was mine) and he does the collection run/maintenance check every 2 weeks.
The pin is played less/has less mileage than most of the machines in collector's homes.
But I digress.
As for ACDC, have we considered what will happen to Pro and Premium values if it goes into the rerun scenario adopted by Stern's production philosophy (Simpsons, LOTR, Spiderman)?
Try selling a "HUO ACDC" for $5000, when you can get a NIB with factory warranty for $5900.