>- got a herpes cure magic rock that I'm selling for $95 USD
I wish you lots of luck.
You do need to understand that while nothing manmade is perfect and nothing works 100 percent of the time, not everything out there is a scam.
There are many people who have had excellent results from some of these electro-therapy devices. Not everyone does and no one claims that but the money back gurantees are there and most companies do honor them.
I do not blame you for skepticism as everyone should use care in their purchases, but by the same token, you are badly outnumbered on these forums by people who use these products and swear by them. If any of these products do not work, you will hear from those on these forums who do use them.
As for your rock idea, keep your day job. Most people would view this as too painful. Try a magic sponge or something.