I have an early standard SO3 for sale.
It has the updated controller and z-axis plate plus homing switches installed.
It will need a new wasteboard but that’s just a piece of MDF.
I am waiting on a replacement homing switch cable as the z-axis limit switch just went out two days ago.
I am in central Alabama. I can disassemble and box it up to ship to you.
$800 firm + shipping cost if applicable.