I have found these to be pretty cool alternatives:
Lower RAM version is $138 with free shipping and in stock. Depends on your use case, but at least an alternative that is not so backordered. I bought mine just to run SpinRite on my hard drives. A Raspberry Pi can not do that.
@rdaily @rpilocator @adafruit That's a $230 x86-based board. 🤷♂️