Altatac via Rakuten offers the 3rd-generation Nest Learning Thermostat in White for $204.95. Coupon code "SAVE15" cuts it to $174.21. With free shipping, that's the lowest price we could find by $28, although we saw it for $31 less in Black Friday. It "learns" how to set your home's temperature, downloads data, and can be controlled from your smartphone via WiFi. Deal ends March 6. Note: This coupon can only be used once per account, with a maximum discount of $60. (You must be signed in to use it.)