Edited January 29, 2020
at 05:13 PM
Best Buy has the AT&T Prepaid Motorola Moto E5 Play for $29.99 (choose activate later).
Motorola Moto E5 Play AT&T Prepaid [bestbuy.com]
Snapdragon 427 Processor
5.2" 1280x720 IPS Display
16GB Internal Storage (expandable via MicroSD)
8MP Rear + 5MP Front Cameras
Android Oreo 8.0
This deal from Nov is back, but without free shipping. You can order for store pickup for free though. ***EDIT*** Is now OOS for shipping. Deal is dead unless BB near you has in stock.
Later it went to regular price, $99.99, and then on sale for $39.99. It's now back to $29.99. I think these won't be around for much longer, as they are a couple of generations old now.
Take note of the comments on the previous post to figure out if this is right for you.
These seem to work on any AT&T MVNO as long as you don't power it on with the included AT&T prepaid SIM first. My son and I are using these as backups with FreedomPop 1yr pre-loaded SIMs with 1GB/mo, BUT, recently I was trying to run out of data and compare data usage of Hangouts Vs the FreedomPop app. All calls with the FreedomPop app (in/out/LTE/WiFi) were disconnected after 10 minutes. I know I've made longer calls in the past, so don't know what's up with that.