The Nest Learning Thermostat 2nd Generation drops from $269 to $249 to $229 with free shipping when you enter code AFF20 at Casa.com. We couldn't find this energy-efficient smart thermostat at any other reputable retailer for less than $249. Plus, you can get up to $100 back from your utility company for purchasing this item. See rebate offers in your region at Amazon.com. The Nest Learning Thermostat learns what temperatures you like, turns itself down when you're away, and can be controlled from anywhere over Wi-Fi, saving you up to 20% on your heating and cooling bill. There's no sales tax (except CO, OK, SD, VT, and TN).