Why we suppose that PiEEG is buggy

Last Updated on March 25, 2024 by pg@petergamma.org https://www.ebay.ch/itm/185245471492 If PiEEG would not be buggy, would it not also be sold on eBay starting from 1 400 USD ,and we would have immediately the first papers which use it for scientific studies? But are not the only papers we find about PiEEG paid promotional papers?