If you buy-in direct to the main event it is $10000, but there are a large number of satellite tournaments with smaller entry fees. Chris Moneymaker entered the 2003 main event through a $39 satellite tournament at PokerStars before going on to win $2.5 million.
The buy ins vary for the different events ranging from $1.5k up to a hefty $50k, the main event buy in is $10k
$10,000.
2010 World Series of Poker - 2010 Main Event Day 1B was released on: USA: 10 August 2010
2010 World Series of Poker - 2010 Main Event Day 1C was released on: USA: 17 August 2010
2010 World Series of Poker - 2010 Main Event Day 1D was released on: USA: 17 August 2010
2010 World Series of Poker - 2010 Main Event Day 2A was released on: USA: 24 August 2010
2010 World Series of Poker - 2010 Main Event Day 2B was released on: USA: 31 August 2010
2010 World Series of Poker - 2010 Main Event Day 4 - Part 2 was released on: USA: 14 September 2010
2010 World Series of Poker - 2010 Main Event Day 2A - Part 2 was released on: USA: 24 August 2010
John Juanda won the 2010 World Series of Poker Europe main event.
2010 World Series of Poker - 2010 2010-10-05 was released on: USA: 5 October 2010
2010 World Series of Poker - 2010 2010-07-27 was released on: USA: 27 July 2010
2010 World Series of Poker - 2010 2010-08-03 was released on: USA: 3 August 2010
2010 World Series of Poker - 2010 2010-09-07 was released on: USA: 7 September 2010