RRP $470, or at least $400+ whenever I see it. Mightyape have 25% off to begin with $350, and you can take a further 20% off with the code CHOICE20 at the checkout.
I paid postage at $11.99 for one week, but ordered three as a group buy-in so YMMV.
These are the best wireless gaming headphones in my opinion. I prefer them over the Astro A50s, which have the inbuilt battery and once they're dead you can use them while they charge (or it's unwieldy to). With the Siberia 800 series (formerly SteelSeries H series, also know as P800 and X800 for consoles) you have two batteries which you can rotate from the charger.
This model is for the PS4 specifically, but it's a universal headset so it will work with PC and Xbox, the only difference being the cords in the box are specific for the PS4. If you want the headphones specifically for Xbox gameplay, look for the Siberia X800 which come with a special cord to plug into the Xbox controller to ensure the mic works on Xbox Live.
Is this better than Sennheister Game One?