Rakuten.com with alatac has the refurbished 2-Pack of D-Link DCS-936L Wireless-N Network Surveillance 720p WiFi Cameras (works with Google Assistant) for $52 - $8 off with coupon code SAVE15 [Exp 6/19] = $44 with free shipping.

Has 16 feet of night vision and provides automatic push alert notifications whenever sound or motion is detected.