Console banned systems are worth more dead then alive since this (generally) isn’t something Microsoft will reverse. Use it as an offline/local multiplayer only system and treat it as an offline/LAN only system if you’re stuck with it.
Sometimes they do provide exceptions if you buy it not knowing (even if you knew and priced it right, I’d still try that line and be prepared for them to say no), but it’s generally only a one shot deal. If you were buyer #2 of the console in a banned state and someone else already did that, they won’t do it again. Because there are NO GUARANTEES it’ll be done, you should price it to the point you can eat it if it’s dead for good because you’re owner #3.
Back in the 360 days, the CPU identifier was used to block the console and you could use JTAG to get into the system to change it and remove the console ban before they patched the JTAG hack with the 2nd generation dashboard. While the Xbone likely has JTAG presence, it’s likely limited to factory testing today especially since they killed it early on the RROD 360 for what people actually used it for. There will be multiple parts paired to prevent CPU replacement, so you will basically need to replace the board and optical drive to reverse the ban - which may cost as much as a clean one.