First let me say that I love violet ray machines! I truly feel it is a service to both these old devices and the people that wish to use them, to fully electrically upgrade them so they are not only modernized but also safer to operate. Because I put so much time, effort and love into testing and rebuilding my violet ray machines, the units I sell will have a higher price tag than other identical units you will find on online. Some of the violet ray machines that I choose to upgrade may truly be one of a kind. Paying more money for a violet ray device that I have refurbished, is not only good insurance, but also truly brings a reliable and functional piece of history into your home. Why take a chance on purchasing one at half the cost, when after week of operation the unit fails? I don't care how good a VR device appears on the outside, if you can't see what it looks like on the inside, you never know what you are going to get. That is why I always include photos of the components inside the box. In addition, I can offer buyers of my rebuilt high frequency generators peace of mind with the knowledge that if something goes wrong with it, I can fix it! All replaced and newly added components come with a one year warranty.