Today Home Depot is offering UP TO 41% OFF SELECT HOME SAFETY ALARMS & EXTINGUISHERS as their special buy of the day. These deals are available online only. They ship free or sometimes you can choose in store pick up.
This is a great deal here: Kidde Value Pack Pro 1A10BC Fire Extinguisher with 9CO5 CO and i9010 10 Year Smoke Alarm. This is normally $119.00, but today you can get it for $70.00