For anyone wanting/needing a cheap Android phone as a music player I found the
Moto G Play (2024) 64GB on Best Buy for just $29.99. It's from Boost Mobile, which I haven't dealt with before, but I expect it'll be similar to TracFone phones and easy enough to just use on WIFI only. As a bonus, at checkout I was able to get free shipping simply for logging in with my free My Best Buy account, even though it's below $35. (Maybe they count tax?)
I bought my Moto E6 four years ago and have replaced the battery once already. I figured for $30 it was worth grabbing this to replace it. It being the 64GB model, so I don't need to add a micro SD card was icing on the cake.