Amazon with Rocktone has the 2-Pack Rocktone 2K Outdoor Wireless Camera w/ Solar Panel (Black) on sale for $50 - 50% off with coupon code ZXE897F2 at checkout = $25 with free shipping on $35+ or with Prime. $12.50 per camera.

• Color Night Vision, 2-Way Talk, Siren Alarm, Cloud or SD card storage
• Maximum monitoring range of 33 feet, requires 2.4GHz WiFi network