Target has 15% off nest products via cartwheel, Nest products over $99 get a free google home mini. 20% coupon works here, and the 20 off $100 tomorrow should work as an alternative. Plus 10% giftcards if you bought them or discover/ redcard. PLUS many energy companies have rebates for smart thermostats like PG&E offering $50.
All in all, I got a Nest E and google home mini for $50ish once I get my rebate check.