Walmart offers the D-Link 802.11n Wireless Internet Day/Night Surveillance Camera in White, model no. DCS-932L, for $39.86. (Amazon charges the same.) Opt for in-store pickup to avoid the $4.97 shipping fee. That's the lowest price we could find by $9, although we saw it for $5 less last July. This security camera connects to your wireless network to provide remote monitoring over the Internet and smartphone apps. It features a native resolution of 640x480, day and night vision, and compatibility with the mydlink.