The Playstation VR’s rival Oculus Rift has a special discount on its headset.
In the UK, the headset has £50 off from its regular price and the price is available only for 48 hours at Currys and John Lewis. After the discount, the price is £499 which is probably the lowest you can come across.
Here is the deal : Get the headset here
Oh!, and I almost forgot, the rift comes with additional sound system which means there is no requirement to buy additional headphones.