Dancing-Hot via eBay offers this DIY Cardboard Virtual Reality Toolkit for $2.15 with free shipping. That's pennies less than our mention from last week and the lowest total price we've seen for such a kit. (It's also a current low by $3.) Like the Google Cardboard, this kit includes everything you need to turn your smartphone into a VR headset: pre-cut cardboard, lenses, magnet, Velcro, and a rubberband.
Note: Allow up to eight weeks for delivery.