Unlike Obama and many other members of Congress, Joe Biden is not a millionaire. When he was vetted for VP by the Obama team, they were surprised by how little the Bidens have accumulated during his second marriage (after his first wife died). They live pretty simply for "Washington elite" (actually, Biden lives in Delaware and famously commutes to Washington via train)
President Obama's 2011 charitable gifts, from his 2011 return:
http://www.dailykos.com/story/2012/0...geous-Donation