LightInTheBox offers the Keeper WiFi 720p Video Doorbell Security Camera for $69.99. Coupon code "KEEPER123" cuts it to $49.99. With free shipping, that's $17 under last week's mention and the lowest price we've seen. (It's the best deal now by $12.) It features 720p video recording, a 166° viewing angle, 2-way audio, night vision, motion detection, 802.11n wireless, and remote access and notifications via mobile app. Two 18650 rechargeable batteries are required, not included.
Note: This item ships from China and may take up to a week to arrive. Uncheck "Add shipping insurance to your order" during checkout to remove the $1.99 fee.
The planet will thank you, your local (overwhelmed) landfill will thank you. Even your budget will thank you.