Just to add. I have bought and/or sold 3 transmitters online. They all looked good. 2 were supposed to be new and one was good/used. They have all worked flawlessly. One has been sold for an excellent price. Just another opinion of whether to buy used or not and from strangers. Karma here and ratings on Ebay plus pictures of the units contribute to a good warm fuzzy feeling. I have an excellent Prism/Spectra combination which was new when I bought it online and an Eclipse that was new when I bought it online recently, also with Spectra. It/they are great! Just FYI!!