The D-link DCS-930L and the wireless HD smart camera by Oco are two affordable options for home security cameras. Both products are available on Amazon.com, as of 2015.
Featuring a VGA CMOs camera, the DCS-930L connects directly to the home's network. The camera can detect motion and sound, and send notifications and snapshots to the user's email address. The camera features 4x digital zoom, a built-in microphone and time stamp overlays. It records at 640 by 480 pixels resolution at 20 frames per second.
Promising enterprise-level security, Oco's HD camera can record at 1280 by 720 resolution at 25 frames per second. It can detect motion, record sound with the built-in microphone and send notifications to the user's mobile phone.