For everybody who is interested, the respeaker 4mic is currently on sale at Reichelt in Germany. If you pay with paydirect shipping is free.
The 4 mic doesn’t have any beamforming so is just an array of microphones. It has a nice pixel ring but also doesn’t have audio out.
‘just like Amazon Echo or Google Home’ is total snakeoil so just beware the 2mic is probably better as it does have onboard audio and half the price and is also not ‘just like Amazon Echo or Google Home’.