Ebay offers Blink - Mini Indoor 1080p Wi-Fi Security Camera - White - Factory Sealed for $20 free shipping.

Product Description:

Get alerts on your smartphone whenever motion is detected, or customize motion detection zones so you can see what matters most
See, hear, and speak to people and pets in your home on your smartphone with Blink Mini's live view and two-way audio features
Set up in minutes - just plug in the camera, connect to Wi-Fi, and add it to your Blink app