It seems that what someone ought to do is this:
- Create a web page which explains this scam in detail, how the thing he is selling is nothing more than a simple resistor that costs ten cents at Radio Shack, as well as a detailed explanation of how it ??works? and how it fails to work, and what it'll do to your fuel economy and emissions, and to your catalytic converter and O2 sensors.
- Buy one of these products, so that you can leave feedback on the seller.
- Leave negative feedback, with the URL of the web site in the first step.
Alas, eBay probably has some rule or another that this would violate. I did report this seller to eBay as a perpetrator of potential fraud, but I dunno what good that'll do. I don't imagine I have much standing to complain if I don't actually buy the product.