I just purchased 3 of them from eBay. All 3 sellers claimed they were tested and worked when shipped.
Only one worked.
One of the sellers is taking his back on his dime and will refund.
The other will take back and refund - except wants me to pay for shipping - which I think is no bueno.
I made three demos. I will share the one of his not working with him and see what he says.
His is the first one. Just chatters...
The second one doesn't power up at all.
The third one works great!