er, uhm, is that question comming from someone renting out his sig space?
This site is about cryptocurrency, a way to literally create money from nothing, same here value is created where there presumably is no value, well until the visionary illuminates the way then suddenly the value is plan to see.
uhhh... I think selling accounts and renting sig space is two completely different things.
renting your sig space means that you get paid for indirectly advertising someone's website. and the more effort you put into building your account, the better you get paid.
selling one's bitcointalk account, however, can end up very messy if some scammer buy a trusted account and scam some people with it
feel free to correct me if I'm wrong, I'm always happy to learn
"wrong" is a strong word, I'd say you're simply misguided.
you don't own the sig space you are renting, likewise the guy selling the account doesn't own that either, both of you are being compensated for the opportunity to do, and/or not do, something. For lack of better terms you are being paid to rent space, and he is being paid to sell an account.
All of that you mentioned about building an account is all taken into consideration when making a value determination.
Just because someone has a trusted account doesn't mean they will always be trustworthy, everyone starts with a trusted account. Conversely, not everyone with a problem account is always a problem. Stick around long enough you will see that scammer scam at ALL levels. When gox did his first scam he had one of the highest trust ratings, and if I'm not mistaken it went down and back up for his next scam. But the time of his third scam he wasn't using the account but it would have likely had hero status with no trust issues because he offered no deals on the site.
BTW, many times when someone buys an account it is for the specific purpose of renting the sig space, so you are in the same boat as them.