& a 50 % chance of success because the pain doesn't go all the way down my leg. Nita & others - that's the cost of the spinal implant back pain zapper. Next thing is to check it out with the insurance co. I wonder if I should mention the 50% part. The main thing really wrong with this pain zapper concept is you have to walk around all the time with this large bird cage looking thing coming out of your spine with a bright white light in it & every time you zap a pain the whole neighborhood hears.