Google Cardboard
VR on the cheap, Unfortunately only 3DoF but a good deal, got mine for 9€ or about 10 US Dollars. Needs a smartphone with a Gyroscope, and may or may not have head straps
Mario: Yo dude I can do VR, and I only spent 9 euros!
Luigi: How dude?
Mario: I bought a Google Cardboard!
Luigi: Woah Cook my brudda
Luigi: How dude?
Mario: I bought a Google Cardboard!
Luigi: Woah Cook my brudda