Where can medical doctors & physiologists on a budget by their EEG devices?

Medical doctors on on a budget from the U.S. can buy their devices from Cody Rall MD with Techforpsych: The Muse 2 is offered as a limited offer for 212 USD incl. tree shipping to U.S. And Swiss physiologists on a budget can buy their EEG devices on eBay & Aliexpress: OpenBCI Cyton cable version …