Sales are going on for the Google Nest Learning Thermostat that are stackable with the ongoing $100 instant rebate for Portland General Electric (Oregon) customers. This brings the Nest down to $99, currently.
This deal is valid for purchase from Best Buy, Home Depot or Lowes.
You can also use the discount to get a Nest E for $69 or Ecobee5 for $149, but those are "regular" prices since there's no additional sales going on for those thermostats.
You can apply for the instant coupon at:
Additional info on this rebate program: