Why would anyone remove negative trust simply because the ownership of the account has "transferred"? This does not make any sense. You would need to get the reason why the account received negative trust resolved prior to being able to getting the negative trust resolved.
Exactly why I won't remove the neg. feedback
I think the only time that this would be an indicator that an account was purchased is if the password was changed multiple times. If the account shows as having it's password reset then it is probably an indicator that the account is potentially hacked.
Well a reset + password change seems very convincing to me and just suspicious in general. If I saw someone asking a loan/selling a product/service and they had that message on their account, I wouldn't deal with them.
I would also make it public which account was purchased and who was doing the purchasing.
I, obviously, neg. rated the person who bought the account.