Hardly anyone buys a phone unlocked in the US. Most buy carrier locked devices and at the low end, it's mostly prepaid. I just bought a Samsung A03 from target that was for prepaid carrier Total Wireless for $10. I didn't activate it, I just use it for testing a mobile app on a lower spec phone.
> The Moto G Pure, Motorola's cheapest, is also $160. Right now, you can get a Moto G Pure for $49 from three different no-contract pre-paid carriers at Wal-Mart.
https://www.amazon.com/TracFone-View-Prepaid-Smartphone-Lock...
Just for the sake of argument, there are brand new android go phones in amazon. So, if you need a phone you can install apps on, $50-$200 being the base price, you can consider $1000 a luxury.
https://www.amazon.com/s?k=android+phone&i=mobile&rh=n%3A707...
If you're talking about an unlocked smartphone that you can install apps on, there is absolutely no such thing as a new Android phone for $20 that any American consumer can buy.
The Samsung Galaxy A03s is Samsung's cheapest, it's considered "ultra-budget", and it costs $160. The Moto G Pure, Motorola's cheapest, is also $160.