Elon Musk's SpaceX is preparing to launch a tender offer in December to sell existing shares at a price of $135 per share, two sources familiar with the matter said.

Pan Am — the airline considered to be among the best of the world during travel’s so-called Golden Age — reportedly at one point had its sights set far beyond the Idlewild to London run. At the peak of the late-1960s space race, the flyer promised bookings for future moon flights to a whopping 100,000 people.

Elon Musk’s SpaceX reportedly plans to launch a tender offer next month that would sell existing shares at a price of $135 each, valuing the company at more than $250 billion.