Same as a new car. As soon as you drive it out the showroom it depreciates 10-20%. The market will flood with AC/DC Pros because there were many games produced. I don't think it is a reflection of the build etc, because it is a good game. I think Stern have to seriously re think the Pro models, as in time, they will drag down the Premiums and LE models. I think the message is clear - "Entry level" is a premium or LE.
Operators can get stuffed, because I have not seen one AC/DC on location that was in working order. They all had problems.