Amazon considered buying Research in Motion, but the BlackBerry maker rejected takeover overtures because it believes it can fix itself on its own, people familiar with the matter told Reuters. Informal talks between the two companies don’t seem to have led to a formal offer or even discussions of a price tag for the takeover, according to anonymous sources. RIM’s board believes the company can regain ground in the crowded mobile market by launching new phones, restructuring, and using its assets more efficiently, the sources said.