My local Homedepot has the Ring Video Doorbell (Wi-Fi Enabled) for $99, regular $199. This is a ymmv since it was in the clearance section. I also picked up some of the gocontrol z-wave sensors/motion detector/ alarm. $49 and $24.
They also have the Canary alarm system for 99. Half off.
Half off of regular price. Prices do not show online, this is ymmv at B&M stores.