first post for me - hopefully it's worth it for some
it's probably not a fantastic deal, but qantas store is selling the above noise cancelling headsets for points/cash. i realise it's overpriced, but if yo have a ton of qantas points and want to use them…?
mx4 - recently added to store - about 100k points, you get 12.5k points back = 87.5k for the headphones
mx3 - on sale - 60k points (saving 14k points)
bose 700 - 80k points (saving 26k points)
good luck
Not a great deal but it's not like there's great ways to spend points at the moment!