Home Depot offers the 2nd-generation Ecobee Ecobee3 Wireless Thermostat with Remote Sensor for $176 with free shipping. That's the lowest price we could find by $4, although it was briefly $28 less last week. 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.