TomTop offers the AnyCast M2 Plus Mini WiFi Media Receiver for $9.97. Coupon code "YYMWD" cuts that to $6.88. With free shipping, that's the lowest price we could find by $3. It features DLNA, Airplay, Miracast and 802.11n wireless for casting media from Android, iOS, and Mac devices to an HDMI TV. (It's not compatible with Windows devices.)

Note: A microUSB power adapter and cable is required for operation but not it included. This item ships from China and may take up to four weeks to arrive. The countdown timer on the product page does not reflect an actual expiration time and resets daily."