Former NBA star Gilbert Arenas made an estimated $140 million during his time in the NBA according to Basketball-Reference.com. In a recent feature with Bleacher Report, Arenas said that during his initial seasons with the Golden State Warriors, it wasn't all glamorous. In fact, Arenas claims that he had a budget of just $400 per month during his first two years in the league thanks to a miscalculation on where he would be drafted.