Usually the Dealnews deals work out pretty smooth. Not this one. Turns out no store has Roku 4 in stock (available on-line) and the coupon is in-store only, so no joy here.
I will leave the link for reference, but if you read the comments, you will see others have invested time and found out it is not in the stores.
http://dealnews.com/c452/Electronics/Streaming-Media-Players/
