Newegg offers the EnGenius 720p 802.11n Wireless Day/Night Survelliance Camera
in White, model no. EDS1130, for $39.99
with free shipping
. That's tied with our October mention as the lowest total price we've seen. (It's a current best by $4.) It features up to a 4x digital zoom, night vision, 1280x720 resolution, 802.11n wireless, microphone and external audio, remote viewing via the EnViewer mobile app, and support for iOS and Android.