Home Depot is selling Ecobee4 and Ecobee3 deals as a Special Buy thru 27 Jan, up to $50 off.
Ecobee3 Lite $149 – https://www.homedepot.c
Ecobee3 Lite with 2 room sensors $195 – https://www.homedepot.c
Ecobee4 with 1 room sensor $199.20 – https://www.homedepot.c