LibreComputers Renegade ROC has been treating me well.

Performance is great. 4GB ram is only $50, 2GB only $40.

Caveats:

Form factor compatible but NOT pin compatible so if you're using a hat or RPi specific code then it won't work.

It does NOT have onboard wifi or bluetooth, but any common usb stick works. I had no need for wifi, so it fit my uses perfectly.