Bloomberg: News Corp. plunked down $864 million in cash and assumed $88 million in costs in November to acquire Realtor.com’s parent company, Move Inc., setting up a testy head-to-head rivalry with the unmatched king of online home-sales information, Zillow. Now, Realtor.com, enriched and emboldened after the News Corp. purchase, is fighting to claw away at Zillow’s mainstay “Zestimates,” contending they just aren’t that accurate.