[kkielhofner]

As other have noted these devices are likely loss leaders.

That said, pretty much ($35 with shipping qty 1):

ESP32-Korvo Development Board https://a.co/d/fmaQfuL

This is a many years old dev board with Wi-Fi, Bluetooth, a multi-mic ring array, RBG LEDs, speaker amplifier, SD slot, etc. Even this old version supports wake word with ring buffer, etc. That said this is also a (fun!) dev board - not a finished product. Newer versions based on the S3 are much more powerful.

Teardowns of Echo devices show much more capable hardware but at Amazon’s scale with their engineering, supply chain, and manufacturing resources they’re probably not losing all that much on Echo devices - although the Echo unit at Amazon has been posting serious losses but I’ve never seen breakouts of where those losses are coming from.