What should be done with the account then? Can you suggest an alternative which doesn't promote account selling and also gives seller some coverage over his loss? I don't encourage account sells either.
Don't accept accounts as collateral. Seems that the OP of that thread was willing to lend it to friends for a few years so recovering the amount wasn't the priority at all.
I wasn't against the idea of account sales a few years ago, but it's obviously a massive problem now, and has been for a year or two now. Before, it was just recommended to use escrow with everyone to avoid 'trustworthy' members that had exchanged hands from scamming. It's way to wide spread of scamming, spamming and other kinds of abuse which accepting accounts as collateral isn't recommended.