Walmart offers the Zmodo 720p Mini WiFi Camera, model no. ZM-SH75D001-WA, for $35.80. (Home Depot and Amazon charge the same.) Opt for in-store pickup to dodge the $5.97 shipping fee. That's tied with our mention from last week and the lowest price we could find now by $1. It features 16-foot night vision, 720p resolution, 2-way microphone, and motion-detection alerts via smartphone app.