Is it possible that people will remove negative trust if the account is sold? If yes, I will buy
It's possible, it has happened before to other sold accounts, but there is no guarantee they would remove it.
Is it possible that people will remove negative trust if the account is sold? If yes, I will buy, Can you point some signature campaigns which allow negative trusted members?
A lot of campaigns allow negative trust users but you need to be manually approved. check services section.