Groupon offers the Contixo 720p Wireless Surveillance Camera with Night Vision for $48.99 with free shipping. (AAA Mart via Amazon charges a buck more.) That's $50 off and the lowest total price we could find. It features 720p resolution, 2-way audio, 128° wide angle lens, 355° pan, infrared night vision up to 32-feet, motion detector, and 32-megapixel lens.