With a market cap that has fallen from $83 billion in 2008 to $13 billion currently -- an 82 percent decline -- rumors are popping up that RIM is ripe for takeover, possibly by Microsoft or Dell. A potential buyer would get a smartphone maker that is still dominant among corporate clients at a bargain basement price. The BlackBerry maker has lost so much value that an acquirer could pay a 50 percent premium and still buy it for a lower multiple than any other company in the cellphone industry.