Saw these in my local store. I'm currently finding literally hundreds of these near me for $3 via BrickSeek. On Walmart.com they are listed at $14.97 down from $19.97, which seems to be about the going rate. Not sure of the real value here, but the kids seemed to like playing around with it.
NOTE: You need your own VR headset and a compatible phone with the Merge app to make this work.