Nearly seven months after it was first announced, you can finally buy Facebook’s Oculus Go. The device is available in 23 countries, starting at $199 for the 32GB model and $259 for the 64GB one. If you need a refresher, Oculus Go is the company’s first standalone VR headset, meaning it doesn’t need to be tethered to a computer (like the Oculus Rift), or strapped onto a phone (like the Gear VR). Facebook says it has the “best optics of any VR system we’ve built,” thanks to new fresnel lenses, and comes with with a 2560×1440 LCD display. It’s powered…

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