The Samsung Gear VR is more akin to Google's Cardboard than HTC's Vive or LG's 360VR. You rely on your phone for the screen, like Cardboard, but you have more possibilities for control thanks to the included physical buttons. Samsung has also been pushing its Milk VR store heavily, collaborating with different content providers and benefitting from its Oculus partnership to provide exclusive material to its Gear VR users. It has created an interesting gadget and platform, one that I have personally been eying for a while but haven't had the chance to test yet.
While many users have gotten a Gear VR for free with the pre-order of a Galaxy S7 or S7 Edge, even more Samsung smartphone owners don't have the virtual reality headset yet. That's either because they have older compatible phones that never benefitted from that promo like the Note 5, S6, S6 Edge, and S6 Edge+, or because they bought their S7s after the pre-order period was over.
Today, you might be able to quell your Gear VR desire and envy, because it's available at the discounted price of $79.99 on eBay. It usually goes for $100 (forget the $149.99 price the seller is quoting), so that's a 20% off discount. These are brand new units sold in a sealed box and from a highly rated seller who's willing to ship them for free in the US and for a fee to a few other countries. (Taxes will only be collected for Illinois residents.) There's a limited quantity available so you better think fast and act faster if you want one.