The AC/DC Pro was a marketing stroke of Genius to the Aussie Market. The AUS$ was $1.07 (March 2012) - 0.97c (May 2012). this was more of a coincidence that worked VERY well. The idea of dropping the price for the Aussie market was to stimulate the pinball economy. I remember it well as dealers were jumping over each other to become Stern retailers to cash in on this bonanza.

AC/DC = Aussie band = BIG sales in Australia. Drop the wholesale price and pass it on to consumers = "The JB Hi Fi" Sales model. Sell cheap, but sell in volume = more profit + stimulate the market. It worked VERY VERY well - and it helped that the game is an absolute cracker to play.

The AUS$ is affecting the price, but Stern can repeat what they did with AC/DC if they wanted to.

For AUS$7000 - I'd expect a Walking Dead LE with colour display. It can be done, but it would reduce profits.