Walmart offers the Roku Express HD with 3 months of CBS All Access for $29. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with last week's mention (which included a 1-month subscription to YouTube TV instead), and is what you'd pay elsewhere for just the Roku. (The 3-month CBS AA subscription is valued at $30.) It streams up to 1080p and connects via an included HDMI cable.
This simple preventive measure takes just seconds to perform.