Laboratory Gas analysis units - $450 (woodside)

I picked these up for free some time ago hoping to make some money on them. I was able to sell one for 600$ a couple months back, but im starting a garage clean out and they take up too much space. If you're a reseller, look them up. Im trying to get 450$ for all of them together. If you put the work in you can probably make 2x - 3x your money back. Im also open to offers. These units have NOT been tested, but they do light up when plugged in, but I make no guarentees that these are working. They are sold as parts only.