Just saw an offer on my assistant page feed from google for a free home mini, just had to pay shipping. Total came to $5.71 for me with tax and shipping.
In order for me to see the offer, I opened the Google app, and clicked the updates tab. Offer was at the very top. This may be targeted so ymmv.
Attached is the offer and checkout receipt. I am on android so not sure about iOS users.
Edit: The "Google" app, not the "Google Home" app
Attached is the "Updates" tab I'm referring to
This seems to only be working if you use assistant on your phone and don't own a google home device. Still worth checking if eligible though, don't forget to try different google accounts.