NB: Amazon Prime member prices are visible in the shopping cart only
1) Prime Members pay $299 on Sennheiser MOMENTUM True Wireless 2 Headphones (40% off RRP)
2) Prime Members pay $249 on Sennheiser PXC 550-II, Over Ear, Black (55% off RRP)
3) Prime Members pay $149 on Sennheiser Over Ear HD 450SE. Exclusive to Amazon AU (50% off RRP)
4) Prime Members pay $119 on Sennheiser TV Listening Wireless Headphones RS 120 II (40% off RRP)
5) Prime Members get a Bonus $50 Amazon Gift Card when you purchase Sennheiser CX True Wireless Headphones shipped and sold by Amazon AU. Add both to cart
6) Prime Members pay $399 on Sennheiser MOMENTUM Over Ear Headphones (33% off RRP)
7) Prime Members pay $99 on Sennheiser Over Ear Wireless HD 350BT (50% off RRP)
8) Prime Members pay $74 on Sennheiser in Ear Wireless Headphones CX 350BT (50% off RRP)
9) Prime Members get a $200 promotional credit for a future eligible order when they purchase & receive a Sennheiser AMBEO Soundbar sold by Amazon AU.
10) Prime Members pay $249 on Sennheiser HD 599 Headphones (24% off RRP)
11) Prime Members pay $83 on Sennheiser HD 400S Over Ear Headphones (44% off RRP)
In terms of value for money, there's not really any significant deals to speak of here, with the Momentum and HD 599 prices being outright scams in the current market place.
The 400S, 350BT, and 450BT are priced OK if you absolutely love their sound, but they don't stand out from the crowd, with the Takstar Pro 82 v2, the AKG K361, the AKG K371, and the AKG N700NC M2 right there.
The PXC-550 II are also decent, but they're also $250 everywhere right now, and aren't worth the 2-2.5x step up from the N700NC M2 most of the time. That being said, I'd recommend them over the rest of the $250-$750 ANC crowd when it comes to sound quality.