Elon Musk and Twitter Inc agreed to postpone the billionaire's deposition scheduled for Thursday as they try to reach an agreement to end their litigation and close Musk's $44 billion purchase of the social media company, a source familiar with the litigation said on Wednesday. Musk took a U-turn on Tuesday - just two weeks before the trial is slated to start on October 17 - and offered to go ahead with the deal at the original price value of $54.20 per share.