Best Buy offers the Samsung SmartThings ADT Wireless Smart Door and Window Sensor for $4.99. Opt for in-store pickup to avoid the $5.49 shipping charge. That's tied with our mention from two weeks ago and the lowest price we could find by $12 today. It pairs with the Samsung SmartThings ADT Security Hub and provides alerts when an intrusion is detected.
These simple ways of earning largely "passive" income can stretch your retirement dollars, cover unexpected expenses or just help you afford a few extras.