google.com
yahoo.com
apple.com
facebook.com
insurance.com
you forgot microsoft.com
But seriously, the domains you mention is worth what it is today, because of the business behind them today.
If they have chosen loohoo, nahoo, fanboy and socialbook, they would be as succesful as they are today. If it wasn't for the business behind them, the only domains worth owning between the ones you mentioned would be apple and insurance. imo