AMEX IAP: US East Coast-SYD/MEL QR $3550, EY $3875
This deal comes and goes, but through EOS, I can see JFK (or other east coast destinations) to SYD/MEL on QR for about $3550 and the same routing on EY for about $3875. I've seen this fare show up a few times on QR, and I saw a similar price on AA a couple of years ago, but I haven't seen EY at this price.