In January 2018 $1 Australian dollar bought US$0.80 today it buys US$0.70.
Basic math on a US$3,000 purchase that equates to 2018 $3,750 vs today $4,286
The other thing to remember is that most large importers hedge themselves against currency fluctuations in various ways. Which sometimes means the impact of currency movements may be delayed or offset - this may mean you can delay one round of currency changes but them have to hit your market with a bigger change down the track.
And remember we will always get reamed by the importers at any chance