Thought Technology 8-channel Infiniti: virtually unused, $2700 for licensed encoder, TT-USB interface and fiber-optic cable, with Biograph version 2.1 licensed software with developer and screen editor tools, Multimodality Suite v. 2.1, and Dynamap Suite V. 2.5. (TT’s website lets you upgrade to v. 3 of Biograph software for free; otherwise they charge $200 to upgrade to v. 4 or 5.)
Lexicor NRS-2D and NRS-4-channel, available with software already installed on W 3.1 or W95 desktop computer or with 3” floppy disks.
Make me an offer for either of these excellent old 4-channel (big box) or 2-channel portable EEG biofeedback systems. Pick up in NY Metro area if you need computer, or pay for shipping.