This was actually good news. Obviously they aren't going to dump them onto an exchange (it'd be entertaining to see Mt Gox 'seize' them back.)

A private auction means more than likely a rich businessman will buy them up to reinvest back into the bitcoin economy. Such as a month ago when there was a record number of bitcoin days destroyed as 100,000's of bitcoins traded hands.... and soon afterward Tradefortress had set up a bitcoin ETF.