The red mark should remain thats the risk of the buyer.
That is the reason why a well established user would have an advantage over some random newbie user buying the account. A more established account has a better chance of being able to get the negative feedback removed.
How would we know that you're not just attempting to remove the feedback by pretending the account was brought?
As mentioned above this has been attempted several times in the past. As mentioned above this did not end up very well for the people attempting this scam