Well, honestly speaking that I've never seen people selling their own data for a few measly bucks as their data is worth a lot compared to what they get paid for it. It's actually priceless. And BTW, would you mind me asking what is the noble cause for which you are asking others to help you out with KYC?
TBH, I'd myself advice everyone to refrain from such activities UNLESS AND UNTIL you know exactly that for what purpose will your data be used.
Then you would be surprised how many people are ready to sell their personal data for $15-20. There is plenty of services who are paying or used to pay for registration and KYC verification. Mostly it's online banks or payment services like Verse, Bitavo, W1tty and etc. People don't value their privacy at all.
Many people live in ultra-authoritarian countries where any words against the state is a crime and if your name added to the "list of terrorists and extremists" you can't even use bank account in any bank.
In some countries like China do exist millions of so called "unregistered children" who of course cannot pass KYC even without being added to "state adversaries" lists.
All of these people cannot pass any KYC without using fake, stolen or bought IDs of another people.
From my point of view, it is absolutely ethical to use stolen IDs from state officials, because they participate in state violence and deserve no mercy!
I understand why people are doing it and being in their place I probably would do same thing. But all these reasons behid this doesn't makes their action legal and ethical.