Did some searching and didn't find this in the Equipment/Sanitation sub.
"Thermapens are rarely returned so we almost never have enough units to hold an "Open Box Sale." We have finally collected a small number here (and from the factory in England) that, for various reasons, we will not sell as new units. Some have slightly damaged packaging, there are a few sales demos, a tiny number are returns, a few have minor cosmetic flaws, and an even smaller number might be "refurbished" to like-new condition after very short term use."
http://www.thermoworks.com/products/thermapen/splashproof_thermapen_open_box_sale_jan_2014.html
"Thermapens are rarely returned so we almost never have enough units to hold an "Open Box Sale." We have finally collected a small number here (and from the factory in England) that, for various reasons, we will not sell as new units. Some have slightly damaged packaging, there are a few sales demos, a tiny number are returns, a few have minor cosmetic flaws, and an even smaller number might be "refurbished" to like-new condition after very short term use."
http://www.thermoworks.com/products/thermapen/splashproof_thermapen_open_box_sale_jan_2014.html