Amazon.com offers the Oregon Scientific Wireless Indoor / Outdoor Thermometer & Atomic Clock, model no. RMR683HGA, for $14.99. Shipping adds around $6, or pad your order over $25 to qualify for free shipping. Even with shipping, that's within a buck of the lowest total price we've seen. Features include temperature readings for up to three locations, 100-foot range, moon phase, ice alert, and more.