Walmart still sells them. They may just be out of stock in your area. They stay stocked in my area.

Sorry to hijack your thread but figured this may be a good place to ask. How does this compare to the shield if I don't care about games. I want to put an Android TV box in my bedroom that can run Kodi and Plex better than a fire stick can, but less expensive than a shield. Would the Mi Box work for me?

Gearbeast has them in stock online for 79.

Walmart. Wait a day or some and they should be back in stock online.

I got mine from aliexpress, but the store i got it from is out of stock "Xiaomi online store" who knows if the store was officially xiaomi but the box works great