Amazon has the Shirestar S91 1080p WiFi Mini Spy Camera for $59.99 - $24 off with coupon 3GRHG294 (Ends 8/20) = $36 with free shipping. Features 1080p video recording, night vision and motion detection, 2.4GHz WiFi, microSD card slot.
Has excellent Amazon Reviews.
Amazon has the Netgear Arlo Q 1080p HD Security Camera 2-Pack (VMC3240-100NAS) for $208 with free shipping. Features a microphone, 300 feet line of sight, 1080p native resolution, and motion and sound alerts.
Amazon has the LeFun C2 Wi-Fi IP Surveillance Camera (White) for $30 with free shipping. Features intelligent motion alerts deliver activity alert message to your phones and tablets directly, built-in Mic, speaker and anti-noise filter, can hold up to 130 hour-long video of continuous recordings.
Has good Amazon Reviews.