I think so too, but there is no way to prevent it. : /
If they aren't sold here, they will be somewhere else. Like this, at least it's done in the open, and everyone knows about it.
Problem is that account creation and selling are what some people do for a living. Not only on this forum, on lots of others too. I firmly believe that the only reason someone will pay good money for an established account is to try and scam someone for more than they paid for the account. I don't believe the rubbish that account sellers bang on about people buying established accounts so they get accepted for signature campaigns, what a load of old bollocks.
Yes, a senior member account will get you into almost all campaigns, and receiving the maximum. More than that or accounts with trust are more likely to be used to try and scam people. : /
But while there is the incentive to do it and no easy way to stop it, it's at least good that everyone knows that it happens and that they should be careful even with older users.