What makes you think the account was sold? I see that you had posted in that thread saying you know him from elsewhere, but unless he gave some kind of proof then him claiming it was sold would likely just be him trying to protect his reputation.
The account was likely worth more then 1.3 BTC (the amount scammed) so the scam in question was not economical for the owner of the account. Sure the victim is out $325, however account owners would have incentives to not scam with such accounts.
Also banning the sale of accounts would likely cause the prices of accounts to decline (there would be an additional risk the account get banned if it is discovered to be sold) so the above incentive not to scam would be removed (or lessened)
I know the user from another forum and I spoke to him a week after posting on that thread. He then told me he sold the account and told me about his new account as well and on checking his new account, he had an account sales account.
That user is quite reputed and hence I know that the account who bought his account was a scammer. He does not care about the reputation of the sold account as he already sold it.
If account sales is banned, it shouldn't affect those accounts which are already sold/bought but only the future sales would stop. Account prices wouldn't matter.
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@OP: This isn't about trust and it's about account sales. I thought that this thread is about account sales
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
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I am listing my points which can be the negatives of selling/buying accounts:
1. The original owner has been spamming earlier to increase his activity and has not been a part of the signature campaign.
The account is sold and now the account (most probably) gets banned as the new owner made few short posts (not really insubstantial) but his post history is full of spam. Account is useless now.
2. The account was banned earlier (once or twice) and the original owner doesn't mention the same. Then the account probably gets banned again. EG:
https://bitcointalk.org/index.php?topic=994097.0;topicseen3. The account was earlier loan defaulted and used as a collateral. High chances of it getting a negative trust and hence it cannot be used for earning via a signature campaign.
4. Accounts get hacked and sold and signed messages aren't provided.
5. Accounts with green trust are sold and they can be easily used for scamming newbies.
6. Account sold and the original owner provides fake evidence of his sold account to be charged for scamming and hence makes it get negative trust.
There can be many possibilities and negatives associated with buying and selling accounts and the above cases have been proved true as well. Sixth one may sound illogical but it's definitely a possibility.