The original Nest Learning Thermostat, (first generation model no. T100577), drops from $249 to $198 with free shipping at Lowes.com, matching the best deal we've seen to date. This is also the current low by $42 for this smart thermostat which "learns" how 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.