Why people buy accounts amazes me still to this day. Just simpler to make account build it up and not pay anything and then join signature campaign and get paid with your hard work and comments than to buy and sell accounts to risk getting banned and suspended on.
Well... Trading of accounts is perfectly legal and not against the rules.
Also I'm sure you're aware that for each fortnight, you can only get 14 activity points. If you post more, you can get no more. So a junior member account has to be at least 6 weeks old.
Anyways this account isn't worth much, because it's a junior member and the owner just revealed its username publicly.