Keeping an eye on a newish rival. SpaceX (SPAX.PVT) agreed on Monday to pay $17 billion for the right to use some of Echostar's wireless spectrum. The deal would allow Elon Musk-owned SpaceX to offer 5G cellphone and broadband services to consumers. SpaceX is the highest-valued private company with a valuation of$458 billion, according to Yahoo Finance data. "They can, of course, compete in broadband to consumers. We have many other competitors there. So, of course, I'm not naive, they can and they wil ...