Update (June 2018): NVIDIA SHIELD Game Controller (2017) @ GameStop for $29.97
I've been waiting for this controller to go to $30.00 new from a previous slick deal but hasn't been on sale since. Monitoring on ebay, these controllers sell for over $40.00 used or new. I've been waiting for a deal to get a second controller for my Nvidia Shield Game Stream setup and was happy with this price.
I was skeptical that this controller was a generic one, but I put a "hold" on this item at one of the local stores that had availability. When I went to pick it up, it is the official 2017 Nvidia Shield Game controller.
I also just ordered 2 more (to now have 4 shield controllers) shipped!