This is a brand new thermostat purchased directly from GQF Manufacturing. It sells for $78.90, and my ship charge for it was $8.51, for a total of $87.41. Here's the link to the thermostat on the GQF website: http://www.gqfmfg.com/store/comersus_viewItem.asp?idProduct=149 Thermostat will come with the wiring diagram included in the original shipment. The reason I'm selling it is that I was given an opportunity to test a thermostat that's fairly new to the market, and this opportunity presented itself just after I ordered the GQF thermo. So, rather than return it, I thought I'd offer it up at a very reduced price! This is a PayPal-only auction. Winning bidder needs to pay by 6 p.m., day auction ends. I will ship out the thermostat by noon the following day.