Good Guys Electronics via Rakuten offers the 3rd-generation Nest Learning Thermostat in several colors (Silver pictured) for $201. Coupon code "GG30" cuts it to $171. With free shipping, that's the best price we could find by $19, although we saw it for just a buck less in our mention from nearly two weeks ago. Buy Now Features smartphone control via WiFi "learns" how to set your home temperature