The original Nest Learning Thermostat, (first generation model no. T100577), drops from $249 to $198 at Lowes.com. With free shipping, that's tied with the best deal we've ever seen (the Black Friday price) on this popular thermostat which learns how you like your home's temps and sets your system automatically. Its also features built-in WiFi that allows it to download data and be programmed from your smartphone. Sales tax is charged in most states.