Let's regulate account sales.
If you can't win, then lead this one?

What about stolen accounts? Are you suggesting that thieves be allowed to sell such accounts too?
Keep the mark for 5 years or 10 years.
Forever! And after each resale, information is added (with the date, link to the topic \ post, and the seller \ buyer's name).
SEEMS LIKE A NO BRAINER.
At a minimum, this will bring account sales within the forum's legal framework. Also, a percentage of the sale proceeds should be transferred to the forum wallet as a commission.
What should be done with old \ previous account posts? All posts shape the image of the previous account owner as a specific person. When an account owner changes, all past posts will have no bearing on the new owner, and sometimes some statements may even be completely different from the new user's new posts. What should be done about this? Should all previous posts by the previous owner be deleted after the account is sold?
I would not want my statements to be associated with another person or vice versa.