HackEEG

«Due to the COVID-19-related semiconductor supply-chain problems, Starcat products are not available at this time.We’ll update this page when they become available again, probably in mid- to late-2023»:

https://www.starcat.io/shop/hackeeg/

PiEEG

PIEEG 4 channels

Orders placed now ship Nov 29, 2023

PiEEG 8 channels

Orders placed now ship Apr 29, 2024

https://www.crowdsupply.com/hackerbci/pieeg#products