Home Depot offers the 2nd-generation Ecobee Ecobee3 Wireless Thermostat with Remote Sensor, model no. EB-STATE3-02, for $199 with free shipping. (Best Buy, Amazon, and Ecobee have it for the same price.) That's the lowest total price we could find by $37, although last month we saw it bundled with an Amazon Echo Dot for only a buck more. It includes one remote sensor (with support for up to 32), which can track temperatures across your home for more accurate temperature settings. It also features a color touchscreen, timer, and remote control smartphone app.