Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html
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I think I paid around $75 for mine. It's missing the leakage probe but otherwise works well. They are very nice devices to have
$75 that's a great deal! I can't remember what I paid for mine although I'm certain it wasn't as low as $75 or as high as $400. I love my unit and don't regret buying it at all.