I didn't say they would sell. I said I thought they were a takeover candidate. RIM is publicly traded. I haven't looked at their filings to see how much stock the insiders own (including their back dated options) but virtually any company can be bought - for a price.
Edit: a quick look at Yahoo Financials:
% of Shares Held by All Insider and 5% Owners: 12%
% of Shares Held by Institutional & Mutual Fund Owners: 75%
So it could be bought, for the right price.