Monoprice sitewide discounts are nothing new, but $50 off a $150 order (with code 50MASTER) is basically unheard of. The only catch is that you’ll have to pay with MasterPass, which is free to sign up for, and works with non-MasterCard credit cards, so it’s really not much of a catch at all.
Source: Gizmodo – Get a PlayStation VR Headset For 0, and More From This Sitewide Monoprice Sale