I have a Thermguard, in original packaging. I'd ordered this years ago but it didn't work well with the blower relay on my furnace (caused a heck of a rattle in the relay) and according to the folks at Bear Mountain Design I have one of the very few incompatible relays on my furnace. I apparently never returned it and just found it in my tool box downstairs. It's probably 4 years old, but is virtually new. $40 shipped to anywhere in the USA via priority mail small flat rate box. PM if interested.