I second the Moto V195 listed for $39 at tmobile's. It's a very good basic phone. I bought 2 of them as backups about a year ago. Tmobile also unlocks them for free if you are a customer.
http://www.t-mobile.com/shop/phones/prepaid.aspx
Phones: Xiaomi Mi Mix 2, Samsung Galaxy A50, ASUS zenfone 3,
Sim cards: AT&T (Contract), 3 UK, Piranha Mobile