David and Charles Koch are billionaire brothers whose financial backing of various Conservative (in particular, Tea Party) causes is so infamous it earned them a (parody) appearance in Will Ferrell and Zach Galifianakis' film The Campaign.

This Sunday, a New York auction house is offering up the perfect gift for the eccentric billionaire in your life: a complete skeleton of a Tyrannosaurus bataaris, an equally tyrannical Asian cousin of the North American T. rex, (according to LiveScience).