Microsoft was willing to offer about $55 billion for the world’s biggest maker of online sales software. Salesforce founder and Chief Executive Marc Benioff had expected as much as $70 billion, CNBC reported on Friday. A potential bidder can go up to $70 billion on the high end and Microsoft, Oracle Corp (ORCL.N) and Amazon.com Inc (AMZN.O) are the companies most likely to be suitors, FBR Capital Markets analyst Dan Ives said in an email to Reuters.