We bought this Gro-Egg Room Thermometer about 5 months ago, used it for less than 3 months. It's pretty cool, glows brighter with hotter temps. Mine comes with plug-in adapter, no manual. We paid $30 plus tax. I'd like $10, plus shipping.
Here is a link about it. http://www.keendistribution.com/product/grocompany/groegg.php

Here's a pic of the one I have.