I have a true Deere dealer service CD that has a lot of tractor models on it. Just as an experiment I bought a couple single model CD's on ebay from different sellers that both absolutely guaranteed they were true Deere factory produced CD's, and not counterfeit. Since I know what real ones look like, I was immediately able to see they were counterfeits that they had attempted to make look like the real ones. Perhaps they have one of those real CD's, and copy off single model portions and sell them. Or maybe just reproduce some else's counterfeit they bought on eBay. Probably make a lot of easy money doing that. Not making any judgments here, just stating how things are.