They can be made for about 30 or 40 dollars from what I understand.
There should be plans on the net. Basically you use a xenon flash, and
wind a coil on the spool of a VHS tape.  If you have an old xenon flash
that you can tear down, or pick one up 2nd hand it could cost less than
that.  We got ours from sota-inc.com, but it was rather expensive if I
remember right.

Marshall

+++++ +++++++ wrote:

> Hi, I looked around and found one which was just over $300 +
  shipping = $350. I have already spent $700 on colloidial silver + a
  water distiller + a CS maker and various instruments to mesaure
  water purity etc. I can't afford all this even though my health is
  priceless - I live on disability ! Anyone know of a cheaper version
  of one of these devices ? Thanks +++++
>