Yes, this can be a one time charge, there is also a subscription option.
Unfortunately this error indicates a hardware problem which is considered a "fatal error" and will almost certainly require service.
This specific error pertains to a scanner pcb fault and/or logic board failure.
The only thing you can try in this case is to reset the machine:
unplug power at the wall outlet
wait 5 minutes
press and hold the power/on button for 60+ seconds
keep holding while plugging back in, and for another 60 seconds after, then release
If still on change, it confirms an internal fault, which requires service. Service for these is not practical either, as repairs on your own would be $200-250, while you could buy a brand new machine for half that.
This is a 2006 model printer which was designed for a service life of only 3 years, and is simply not worth fixing at this point.
Let me know how the reset goes, and I'll help with replacement recommendations at that point if needed.
Best regards, ***** ***** for the news,