The Aliexpress Sounds Good store offered 16 channel OpenBCI modules US $418.00, but they are not available anymore: https://www.aliexpress.com/item/4000244594585.html?spm=a2g0o.productlist.main.23.2f6b51beVMbnNn&algo_pvid=5cd63584-96b9-473d-bc41-90c4d9b73706&algo_exp_id=5cd63584-96b9-473d-bc41-90c4d9b73706-11&pdp_ext_f=%7B%22sku_id%22%3A%2210000000992301213%22%7D&pdp_npi=2%40dis%21USD%21236.0%21236.0%21%21%21%21%21%400b0a558a16736260606578517d06a6%2110000000992301213%21sea&curPageLogUid=YdjISWLuiBA6 The Aliexpress ESP-All Store offers 16 channel OpenBCI modules with improved WIFI, which are available for US $668.63: https://www.aliexpress.com/item/1005003298162429.html?spm=a2g0o.productlist.main.75.2f6b51beVMbnNn&algo_pvid=5cd63584-96b9-473d-bc41-90c4d9b73706&algo_exp_id=5cd63584-96b9-473d-bc41-90c4d9b73706-37&pdp_ext_f=%7B%22sku_id%22%3A%2212000025081286411%22%7D&pdp_npi=2%40dis%21USD%21768.54%21668.63%21%21%21%21%21%400b0a558a16736260606578517d06a6%2112000025081286411%21sea&curPageLogUid=MROZ2jBogBLy If we take two 16 channel boards form the Aliexpress ESP-All Store, we get a total of …