Listings range from $30 to $59.99. The two $30 used units are the cheapest but include no extras. At $47.95, the open-box unit with an 11-piece installation kit adds real value for DIYers. The $59.99 new unit is the most expensive but comes sealed with hardware. The $30 used Sensi is the best value for experienced installers, while the $47.95 open-box kit is the smartest pick for beginners.
| Item | Price | Condition | Shipping | |
|---|---|---|---|---|
| ⭐ This item | Sensi ST55U Smart Wi-Fi Thermostat White | $30.00 | Used | — |
| View | Sensi ST55U WiFi Smart Thermostat White | $35.99 | — | — |
| View | Emerson Sensi ST55 Smart Thermostat | $45.00 | — | — |