Yeah Im not advocating buying a used furnace.. but I probably wouldnt be in business still if I didnt get good deals on used equipment, or know how to fix my own equipment. This is the great thing about ebay though, Ive purchased brand new zubler ovens, still in the box, on ebay for 1/3 of the new price. It depends on your situation if you should buy used, if your starting out and bootstrapping, you can find something that works for much cheaper than new.. if you have a huge workload and you need something reliable, then obviously buy something new with a warranty.