imagine there is a street in your city and diamonds are spread out there anyone can take them sell them and make money but they are 0.5 underneath the street every body is looking for them and trying to find more diamonds, you invent a machine which can show you where exactly the diamonds are, whats your reason to start selling the machine instead of looking for diamonds?!!
i mean it dosent make sense! it dosent look to be useful machine! why with unit which you can make 3000+  usd a month you will sell them for 1000+ u , and can make 3000+ a month you will start selling them instead making money with them?!

any idea?