Google’s 2020 Nest Thermostat is $50 off. | Photo by Dan Seifert / The Verge If you’re looking for a relatively affordable way to cut down on cooling costs, Google’s Nest Thermostat can help. It’s packed with smart controls and energy-saving features, and right now it’s on sale in white for $79 ($50 off), which is its best price of the year, at Amazon.  Google Nest Thermostat Where to Buy: $129.99 $79 at Amazon The smart thermostat is quick to install and makes it easy to adjust your home’