Does that mean there's sufficient margin in Stern Australia pricing now to absorb a USA price increase? 

Thats a question only Bruce Colbourne/AMD can answer Nick.
Bruce is not a dummy, he has weathered the slow years, has invested heavily into making pinballs a profitable part of his business during the last 2 growth years, and where I think Bruce has a good business, he listens to his customers, and keeps his fingers on the pulse and is a straight shooter.

Having done business with Bruce a number of times, he will do everything in his power to keep his loyal and new customers happy.
I dont think for the sake of a few bucks he will jeapordise a new pinball machine order if someone was extremely opposed to a slight price increase.
He is a terribly nice bloke, and always willing to do deals to get brand new in box machines out of his warehouse and into your gamesroom.
I am sure others who have dealt with Bruce would also hold him in high esteem.