$119 599 SE - https://www.amazon.com.au/Sennheiser-Open-Back-Special-Black…
$159 560S - https://www.ozbargain.com.au/node/927235
$249 620S - https://www.amazon.com.au/Sennheiser-620S-Closed-Back-Headph…
$269 505 - https://www.amazon.com.au/Sennheiser-HD-505-Headphones-Trans…
$299 600 - https://www.amazon.com.au/Sennheiser-4465-HD-600-Headphones/dp/B00004SY4H/ (expired)
$284.05 600 - https://www.ozbargain.com.au/node/927735
$429 650 - https://www.amazon.com.au/Sennheiser-HD-650-Headphones/dp/B0…
$599 660S2 - https://www.amazon.com.au/Sennheiser-660S2-Audiophile-Stereo…
599 SE Product description:
- Premium, audiophile-grade over ear, open back headphones
- Lightweight with luxurious velour covered ear pads for extreme comfort
- Compatible with virtually every audio device including phones, tablets and computers
- Two detachable cables included (3 meter with 6.3 millimeter jack and 1.2 meter with 3.5 millimeter jack)
- Connector type: 3.5mm jack
Mod Edit: Removed duplicate from title
![[Prime] Sennheiser Headphones: 599 SE $119, 505 $269, 620S $249, 600 $299, 650 $429, 660S2 $599 Delivered @ Amazon AU](https://files.ozbargain.com.au/n/66/927266.jpg?h=9b781478)


CamelCamelCamel
560S if you're on a budget, 600 if you're happy with its tonal balance compared to the 650/6XX, otherwise wait for better sales.
It would seem the new HIFIMAN releases have spooked Sennheiser into some more price cuts.