The Quest is Oculus' first stand-alone virtual reality headset featuring 6 degree of freedom (6DoF) inside-out tracking with two 6DoF controllers. This means that you can experience VR while moving around your room with no computer, wires, tethers, or external sensors. You're able to put the Quest on and jump into VR immediately with no setup or additional equipment required.
The Oculus Quest released on May 21st, 2019 and can now be purchased. Please refer to the above link.
The Oculus Quest is available in two storage configurations: 64GB and 128GB. The 64GB Quest retails for $399 USD. The 128GB version retails for $499.